scholarly journals Heterogeneous Electrocatalysts for CO2 Reduction to Value Added Products

2021 ◽  
Author(s):  
M. Amin Farkhondehfal ◽  
Juqin Zeng
Keyword(s):  
Fossil Fuels ◽  
Greenhouse Gas Emission ◽  
Global Climate ◽  
Renewable Energy Sources ◽  
Critical Role ◽  
Co2 Reduction ◽  
Value Added ◽  
Reduction Reaction ◽  
Added Value ◽  
Global Climate Changes

The CO2 that comes from the use of fossil fuels accounts for about 65% of the global greenhouse gas emission, and it plays a critical role in global climate changes. Among the different strategies that have been considered to address the storage and reutilization of CO2, the transformation of CO2 into chemicals and fuels with a high added-value has been considered a winning approach. This transformation is able to reduce the carbon emission and induce a “fuel switching” that exploits renewable energy sources. The aim of this chapter is to categorize different heterogeneous electrocatalysts which are being used for CO2 reduction, based on the desired products of the above mentioned reactions: from formic acid and carbon monoxide to methanol and ethanol and other possible by products. Moreover, a brief description of the kinetic and mechanism of the CO2 reduction reaction) and pathways toward different products have been discussed.

scholarly journals Public Views of the Economy of the Renewable Energy Sources: Evidence from Russia

2021 ◽  
Vol 15 (3) ◽  
pp. 256-266
Author(s):  
Dalia Streimikiene ◽  
Victoria Akberdina
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Online Survey ◽  
Global Climate ◽  
Renewable Energy Sources ◽  
Public Support ◽  
Energy Sources ◽  
The Public ◽  
Global Climate Changes ◽  
Public Views

Recent worldwide growing awareness of the global climate changes stressed the importance of developing and supporting the renewable energy sources (RES). However, the public support for RES varies across various countries and regions, especially those abundant in traditional fossil fuels. This paper presents the analysis of the public views of the economics of the renewable energy using the results of the online survey (N = 750) conducted in several regions of the Russian Federation, a country abundant in natural gas and oil. Our results indicate that there is a mixed opinion on trust in RES as opposed to the traditional energy sources. Even though we found some support for the renewable energy technologies, it appears that it is correlated with the respondents’ concerns about the environmental protection and sustainable development as well as with some demographic variables. The outcomes of the regression analysis confirmed that positive attitudes towards climate protection predetermined the support for various types of RES, while the financial or political gains did not come through as significant. The results indicate that public views on the renewable energy sources could and should be shaped by the information campaigns and presentations in mass media conducted by relevant policymakers and public authorities.

scholarly journals HISTORICAL DEVELOPMENTS IN CARBON SOURCES, BIOMASS, FOSSILS, BIOFUELS AND BIOTECHNOLOGY REVIEW ARTICLE

2016 ◽  
Vol 1 (2) ◽  
pp. 71 ◽  
Author(s):  
Savas G. Anastassiadis
Keyword(s):  
Alternative Energy ◽  
Fossil Fuels ◽  
Global Climate ◽  
Renewable Energy Sources ◽  
Carbon Sources ◽  
Modern Society ◽  
Review Article ◽  
Energy Sources ◽  
Fossil Energy ◽  
Global Climate Changes

Since early human history and existence energy rich plants, wood and forest cellulosic material have been used for fire, light, heating, cooking and other daily activities. Fossil energy was the foundation of our modern society and industrialization since last two centuries, while exploration and exploitation of oil reserves and petrochemistry have largely shaped 20th century. Increasing concerns on environmental pollution, accelerated global warming, and global climate changes, continuing world's crude oil (fossil fuels) consumption and depletion, as well as energy security and energy crisis caused by daily burning large amounts of fossil fuels, led to the attraction, search and development of renewable, carbon-neutral, economically viable alternative energy sources, such as biofuels, slowly displacing petroleum fuels. In continuously growing human population reaching about 10 billion in 2050, various renewable energy sources are promoted and developed, to ensure rising energy demands in a world running out of fossil energy sources. Biofuels are produced from any kind of available biomass and categorized based on utilized carbon resources into first-, second- and third-generation. Nevertheless, biofuels’ future outlook is though beset by uncertainty. Hereby, various issues and concerns related to fossils and renewable biofuels are described and analyzed in present review article.

scholarly journals Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO2 to SYNGAS

2021 ◽  
Author(s):  
Mohammadali Beheshti ◽  
Saeid Kakooei ◽  
Mokhtar Che Ismail ◽  
Shohreh Shahrestani
Keyword(s):  
Large Scale ◽  
Steel Substrate ◽  
Renewable Energy Sources ◽  
Coke Formation ◽  
Co2 Reduction ◽  
Value Added ◽  
Reduction Reaction ◽  
Electrochemical Tests ◽  
Reduction Of Co2 ◽  
Co2 Reduction Reaction

In the last decade, there is some research on the conversion of CO2 to energy form. CO2 can be converted to value-added chemicals including HCOOH, CO, CH4, C2H4, and liquid hydrocarbons that can be used in various industries. Among the methods, electrochemical methods are of concern regarding their capability to operate with an acceptable reaction rate and great efficiency at room temperature and can be easily coupled with renewable energy sources. Besides, electrochemical cell devices have been manufactured in a variety of sizes, from portable to large-scale applications. Catalysts that optionally reduce CO2 at low potential are required. Therefore, choosing a suitable electrocatalyst is very important. This chapter focused on the electrochemical reduction of CO2 by Zn-Ni bimetallic electrocatalyst. The Zn-Ni coatings were deposited on the low-carbon steel substrate. Electrochemical deposition parameters such as temperature in terms of LPR corrosion rate, microstructure, microcracks, and its composition have been investigated. Then, the electrocatalyst stability and activity, as well as gas intensity and selectivity, were inspected by SEM/EDX analysis, GC, and electrochemical tests. Among the electrocatalysts for CO2 reduction reaction, the Zn65%-Ni35% electrode with cluster-like microstructure had the best performance for CO2 reduction reaction according to minimum coke formation (<10%) and optimum CO and H2 faradaic efficiencies (CO FE% = 55% and H2 FE% = 45%).

scholarly journals Post COVID-19 Recovery and 2050 Climate Change Targets: Changing the Emphasis from Promotion of Renewables to Mandated Curtailment of Fossil Fuels in the EU Policies

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1347
Author(s):  
Kyriakos Maniatis ◽  
David Chiaramonti ◽  
Eric van den Heuvel
Keyword(s):  
Climate Change ◽  
European Union ◽  
Renewable Energy ◽  
Global Economy ◽  
Fossil Fuels ◽  
Global Climate ◽  
Renewable Energy Sources ◽  
Climate Change Policy ◽  
Climate Impacts ◽  
The European Union

The present work considers the dramatic changes the COVID-19 pandemic has brought to the global economy, with particular emphasis on energy. Focusing on the European Union, the article discusses the opportunities policy makers can implement to reduce the climate impacts and achieve the Paris Agreement 2050 targets. The analysis specifically looks at the fossil fuels industry and the future of the fossil sector post COVID-19 pandemic. The analysis first revises the fossil fuel sector, and then considers the need for a shift of the global climate change policy from promoting the deployment of renewable energy sources to curtailing the use of fossil fuels. This will be a change to the current global approach, from a relative passive one to a strategically dynamic and proactive one. Such a curtailment should be based on actual volumes of fossil fuels used and not on percentages. Finally, conclusions are preliminary applied to the European Union policies for net zero by 2050 based on a two-fold strategy: continuing and reinforcing the implementation of the Renewable Energy Directive to 2035, while adopting a new directive for fixed and over time increasing curtailment of fossils as of 2025 until 2050.

Atomic-level engineering of two-dimensional electrocatalysts for CO2 Reduction

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei Shao ◽  
Xiaodong Zhang
Keyword(s):  
Carbon Dioxide ◽  
Fossil Fuels ◽  
Co2 Reduction ◽  
Value Added ◽  
Atomic Level ◽  
Two Dimensional ◽  
Excessive Consumption

Carbon dioxide (CO2) from the excessive consumption of fossil fuels has exhibited a huge threat to the planet’s ecosystem. Electrocatalytic CO2 reduction into value-added chemicals have been regarded as a...

scholarly journals Quasi-graphitic carbon shell-induced Cu confinement promotes electrocatalytic CO2 reduction toward C2+ products

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ji-Yong Kim ◽  
Deokgi Hong ◽  
Jae-Chan Lee ◽  
Hyoung Gyun Kim ◽  
Sungwoo Lee ◽  
...  
Keyword(s):  
High Efficiency ◽  
Co2 Reduction ◽  
Value Added ◽  
Material Design ◽  
Catalyst System ◽  
Critical Issue ◽  
Reduction Reaction ◽  
Catalyst Design ◽  
Design Strategies ◽  
Faradaic Efficiency

AbstractFor steady electroconversion to value-added chemical products with high efficiency, electrocatalyst reconstruction during electrochemical reactions is a critical issue in catalyst design strategies. Here, we report a reconstruction-immunized catalyst system in which Cu nanoparticles are protected by a quasi-graphitic C shell. This C shell epitaxially grew on Cu with quasi-graphitic bonding via a gas–solid reaction governed by the CO (g) - CO2 (g) - C (s) equilibrium. The quasi-graphitic C shell-coated Cu was stable during the CO2 reduction reaction and provided a platform for rational material design. C2+ product selectivity could be additionally improved by doping p-block elements. These elements modulated the electronic structure of the Cu surface and its binding properties, which can affect the intermediate binding and CO dimerization barrier. B-modified Cu attained a 68.1% Faradaic efficiency for C2H4 at −0.55 V (vs RHE) and a C2H4 cathodic power conversion efficiency of 44.0%. In the case of N-modified Cu, an improved C2+ selectivity of 82.3% at a partial current density of 329.2 mA/cm2 was acquired. Quasi-graphitic C shells, which enable surface stabilization and inner element doping, can realize stable CO2-to-C2H4 conversion over 180 h and allow practical application of electrocatalysts for renewable energy conversion.

Surface overgrowth on gold nanoparticles modulating high-energy facets for efficient electrochemical CO2 reduction

Nanoscale ◽  
2021 ◽  
Author(s):  
Woong Choi ◽  
Joon Woo Park ◽  
Woonghyeon Park ◽  
Yousung Jung ◽  
Hyunjoon Song
Keyword(s):  
Gold Nanoparticles ◽  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Co2 Reduction ◽  
High Energy ◽  
Reduction Reaction ◽  
Chemical Energy ◽  
Energy Sources ◽  
Electrochemical Co2 Reduction

Electrochemical CO2 reduction reaction (eCO2RR) has been considered one of the potential technologies to store electricity from renewable energy sources into chemical energy. For this aim, designing catalysts with high...

Hierarchical three-dimensional copper selenide nanocubes microelectrodes for improved carbon dioxide reduction reaction

2021 ◽  
Author(s):  
Rajasekaran Elakkiya ◽  
Govindhan Maduraiveeran
Keyword(s):  
Carbon Dioxide ◽  
High Performance ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
Value Added ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Earth Abundant ◽  
Carbon Dioxide Co2 ◽  
Co2 Reduction Reaction

Design of high-performance and Earth-abundant electrocatalysts for electrochemical carbon dioxide (CO2) reduction reaction (CO2RR) into fuels and value-added chemicals offers an emergent pathway for environment and energy sustainable concerns. Herein,...

ENVIRONMENTALLY SUSTAINABLE ENERGY FOR THE EAST ASIA/PACIFIC REGION: IMPLICATIONS AND OPPORTUNITIES FOR AUSTRALIAN OIL AND GAS EXPLORERS AND PRODUCERS

1997 ◽  
Vol 37 (1) ◽  
pp. 722
Author(s):  
N.G. Grollman
Keyword(s):  
Fossil Fuels ◽  
Oil And Gas ◽  
Renewable Energy Sources ◽  
Value Added ◽  
Petroleum Exploration ◽  
Asia Pacific ◽  
Power Generators ◽  
Environmentally Sustainable ◽  
Resource Limitations

The oil and gas reserves of Australia and the East Asian region fall well short of the region's long-term requirements, even for a scenario that phases out all fossil fuels by the end of the 21st century. There is, therefore, no contradiction between vigorous exploration for oil and gas and the process of transition to renewable energy sources. However, to be an independent player in environmental policy-making, the Australian petroleum exploration industry should focus on its particular role within the energy sector as a whole, whose nature will change radically over the next several decades. This role will combine concerns over long term oil supply security with, in particular, the objective of reducing greenhouse gas emissions from oil and gas consumption to levels commensurate with Australia's international obligations. The role extends to Australian involvement in the region as a whole through the accrual of emissions credits from projects implemented jointly with developing countries. It also envisages that Australian explorers, especially those focussed on gas, will form alliances with downstream companies, power generators, appliance manufacturers and energy marketers as links in an integrated chain of operations with value added and emissions reduced at each stage. This re-orientation should lead the industry to question the extent to which its interests correspond with those of the coal and mineral industries, which do not face the same resource limitations.

scholarly journals Agriculture Adaptation to Consequences of Global Climate Changes

2021 ◽  
Vol 18 (2) ◽  
pp. 13-20
Author(s):  
D. G. Galkin
Keyword(s):  
Climate Change ◽  
Agricultural Production ◽  
Climate Changes ◽  
Greenhouse Gas Emission ◽  
Traditional Approach ◽  
Global Climate ◽  
Global Climate Changes ◽  
Change Impact ◽  
Agriculture Development

The goal of the article is to work out recommendations aimed at providing sustainability of agriculture development on the level of national economy in conditions of changing climate. The agriculture development within the frames of traditional approach can be studied in two aspects: as a sector subjected to the global climate change impact; as a sector promoting climate change due to greenhouse gas emission. The authors showed that in regard to present trends scientific recommendations aimed at agriculture adaptation to climate changes are the most significant for Russia. On the basis of provided concepts they identified key lines in the said adaptation: to develop innovation connected with adaptation to consequences of climate changes; to upgrade the system of agro-insurance; to use methods of organic food production; to monitor and appraise adaptation of agriculture to climate changes; to introduce strategic planning of sustainable development and location of agricultural production. These lines should be realized on the basis of integrity, strategic orientation and scientific support of agricultural production. These lines can stabilize the level of key parameters of the sector in the long-term perspective.

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