High-Efficiency Electrochemical Hydrogen Evolution Based on Surface Autocatalytic Effect of Ultrathin 3C-SiC Nanocrystals

Nano Letters ◽  
2012 ◽  
Vol 12 (3) ◽  
pp. 1545-1548 ◽  
Author(s):  
Chengyu He ◽  
Xinglong Wu ◽  
Jiancang Shen ◽  
Paul K. Chu
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency ◽  
Autocatalytic Effect

High proportion of 1 T phase MoS2 prepared by a simple solvothermal method for high-efficiency electrocatalytic hydrogen evolution

2021 ◽  
Vol 422 ◽  
pp. 130100
Author(s):  
Jingdong Li ◽  
Arthur Listwan ◽  
Jianxing Liang ◽  
Feng Shi ◽  
Kan Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency ◽  
Solvothermal Method ◽  
T Phase

scholarly journals Synergistic Interfacial and Doping Engineering of Heterostructured NiCo(OH)x-CoyW as an Efficient Alkaline Hydrogen Evolution Electrocatalyst

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ruopeng Li ◽  
Hao Xu ◽  
Peixia Yang ◽  
Dan Wang ◽  
Yun Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency ◽  
Low Voltage ◽  
Electrochemical Etching ◽  
Synergistic Effects ◽  
Release Kinetics ◽  
Water Electrolysis ◽  
Water Dissociation ◽  
Practical Applications ◽  
Environmentally Friendly Process

AbstractTo achieve high efficiency of water electrolysis to produce hydrogen (H2), developing non-noble metal-based catalysts with considerable performance have been considered as a crucial strategy, which is correlated with both the interphase properties and multi-metal synergistic effects. Herein, as a proof of concept, a delicate NiCo(OH)x-CoyW catalyst with a bush-like heterostructure was realized via gas-template-assisted electrodeposition, followed by an electrochemical etching-growth process, which ensured a high active area and fast gas release kinetics for a superior hydrogen evolution reaction, with an overpotential of 21 and 139 mV at 10 and 500 mA cm−2, respectively. Physical and electrochemical analyses demonstrated that the synergistic effect of the NiCo(OH)x/CoyW heterogeneous interface resulted in favorable electron redistribution and faster electron transfer efficiency. The amorphous NiCo(OH)x strengthened the water dissociation step, and metal phase of CoW provided sufficient sites for moderate H immediate adsorption/H2 desorption. In addition, NiCo(OH)x-CoyW exhibited desirable urea oxidation reaction activity for matching H2 generation with a low voltage of 1.51 V at 50 mA cm−2. More importantly, the synthesis and testing of the NiCo(OH)x-CoyW catalyst in this study were all solar-powered, suggesting a promising environmentally friendly process for practical applications.

Modulating interfacial charge distribution of single atoms confined in molybdenum phosphosulfide heterostructures for high efficiency hydrogen evolution

2021 ◽  
Vol 414 ◽  
pp. 128834 ◽  
Author(s):  
Jiachen Li ◽  
Chi Zhang ◽  
Huijun Ma ◽  
Taihe Wang ◽  
Zhaoqi Guo ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Charge Distribution ◽  
High Efficiency ◽  
Single Atoms ◽  
Interfacial Charge

Construction of a novel 2D-2D heterojunction by coupling covalent organic framework and In2S3 for photocatalytic removal of organic pollutants with high efficiency

2021 ◽  
Author(s):  
Luqiu Li ◽  
Dongguang Yin ◽  
Xiandi Guo
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Organic Pollutants ◽  
High Efficiency ◽  
Crystalline Material ◽  
Charge Carriers ◽  
Covalent Organic Frameworks ◽  
Covalent Organic Framework ◽  
Photocatalytic Removal ◽  
Visible Light Driven

Covalent organic frameworks (COFs) representing an emerging class of porous crystalline material have shown promising visible-light-driven hydrogen evolution activity. However, they have a high recombination ratio of charge carriers and...

High-efficiency hydrogen evolution from seawater using hetero-structured T/Td phase ReS2 nanosheets with cationic vacancies

Nano Energy ◽  
2019 ◽  
Vol 55 ◽  
pp. 42-48 ◽  
Author(s):  
Gang Zhou ◽  
Zijing Guo ◽  
Yun Shan ◽  
Shuyi Wu ◽  
Jinlei Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency

Copper (0) Doping Makes Cobalt-Nickel Hydroxide a High-Efficiency Catalyst for Hydrogen Evolution Reaction

2018 ◽  
Vol 165 (13) ◽  
pp. H866-H871 ◽  
Author(s):  
Jingjing Bai ◽  
Qiangqiang Sun ◽  
Meng Zhou ◽  
Liyuan Wang ◽  
Yuqian Shen ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nickel Hydroxide ◽  
High Efficiency ◽  
Cobalt Nickel

scholarly journals Comprehensive Evaluation of Transition Metal Doped Ni3N to Construct High-Efficiency Hydrogen Evolution Catalyst

2021 ◽  
Author(s):  
Meng Wang ◽  
Zepeng Lv ◽  
Xuewei Lv ◽  
Qian Li ◽  
Jie Dang
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Density Functional ◽  
Rational Design ◽  
Dft Calculation ◽  
High Efficiency ◽  
Comprehensive Evaluation ◽  
Low Cost ◽  
Alkaline Electrolyte ◽  
Metal Doped

Abstract Density functional theory (DFT) calculation indicators (ΔG, densities of state, D-band and bader charge) are commonly used to predict and analyze the hydrogen evolution reaction (HER) activity of catalysts, and most studies discuss only one or few of these indicators’ impact on catalysis, but still no report has comprehensively evaluated the influence of all these indicators on catalytic performance. Herein, foreseen by comprehensive consideration first, we report transition metal doped Ni3N nanosheets combined on Ni foam for utra-efficient alkaline hydrogen evolution. For dual transition metals doped Ni3N, Co,V-Ni3N exhibits remarkable HER performance with a significantly low overpotential of only 10 mV in alkaline electrolyte and 41 mV in alkaline seawater electrolyte at 10 mA cm− 2; while for single transition metal doped Ni3N, V-Ni3N exhibits the best performance with an overpotential of 15 mV and a Tafel slope of 37 mV dec− 1. Our work highlights the importance of comprehensive evaluation of DFT calculation indexes, and opens up a new method for the rational design of efficient and low-cost catalysts.

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