Enhancement of alkaline water splitting activity by Co–P coating on a copper oxide nanowire

2019 ◽  
Vol 48 (3) ◽  
pp. 891-897 ◽  
Author(s):  
Bing Chang ◽  
Yingchun Yang ◽  
Zhixiang Ye ◽  
Shengyu Liu
Keyword(s):  
Catalytic Activity ◽  
Copper Oxide ◽  
Water Splitting ◽  
Nanowire Array ◽  
Cell Voltage ◽  
Electrode Configuration ◽  
Alkaline Water ◽  
A Cell ◽  
Cuo Nanowire

An amorphous Co–P shell coating on a copper oxide nanowire array to synergistically boost the catalytic activity toward alkaline water splitting, and this shell/core Co–P/CuO nanowire array is durable with a cell voltage of only 1.645 V to reach 20 mA cm−2 by a two-electrode configuration in an alkaline water electrolyzer.

A self-supported amorphous Ni–P alloy on a CuO nanowire array: an efficient 3D electrode catalyst for water splitting in alkaline media

2018 ◽  
Vol 54 (19) ◽  
pp. 2393-2396 ◽  
Author(s):  
Bing Chang ◽  
Shuai Hao ◽  
Zhixiang Ye ◽  
Yingchun Yang
Keyword(s):  
Water Splitting ◽  
Nanowire Array ◽  
Cell Voltage ◽  
Alkaline Media ◽  
Core Shell ◽  
Alkaline Water ◽  
A Cell ◽  
Cuo Nanowire ◽  
A Current ◽  
3D Electrode

An amorphous Ni–P alloy shell electrodeposited on a CuO nanowire array to synergistically boost the catalytic activity toward alkaline water splitting is reported, and this core@shell CuO@Ni–P nanowire array is durable with a cell voltage of only 1.71 V reaching a current density of 30 mA cm−2 using a two-electrode configuration in an alkaline water electrolyzer.

scholarly journals Electrodeposition of Pt-Decorated Ni(OH)2/CeO2 Hybrid as Superior Bifunctional Electrocatalyst for Water Splitting

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Huanhuan Liu ◽  
Zhenhua Yan ◽  
Xiang Chen ◽  
Jinhan Li ◽  
Le Zhang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Cell Voltage ◽  
Water Electrolysis ◽  
Active Species ◽  
Water Dissociation ◽  
Electronic Interaction ◽  
Bifunctional Electrocatalyst ◽  
Highly Active ◽  
A Cell ◽  
Promising Application

The facile synthesis of highly active and stable bifunctional electrocatalysts to catalyze water splitting is attractive but challenging. Herein, we report the electrodeposition of Pt-decorated Ni(OH)2/CeO2 (PNC) hybrid as an efficient and robust bifunctional electrocatalyst. The graphite-supported PNC catalyst delivers superior hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities over the benchmark Pt/C and RuO2, respectively. For overall water electrolysis, the PNC hybrid only requires a cell voltage of 1.45 V at 10 mA cm−2 and sustains over 85 h at 1000 mA cm−2. The remarkable HER/OER performances are attributed to the superhydrophilicity and multiple effects of PNC, in which Ni(OH)2 and CeO2 accelerate HER on Pt due to promoted water dissociation and strong electronic interaction, while the electron-pulling Ce cations facilitate the generation of high-valence Ni OER-active species. These results suggest the promising application of PNC for H2 production from water electrolysis.

An advanced and highly efficient Ce assisted NiFe-LDH electrocatalyst for overall water splitting

2020 ◽  
Vol 4 (1) ◽  
pp. 312-323 ◽  
Author(s):  
Harsharaj S. Jadhav ◽  
Animesh Roy ◽  
Bezawit Z. Desalegan ◽  
Jeong Gil Seo
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Room Temperature ◽  
Cell Voltage ◽  
Highly Efficient ◽  
Overall Water Splitting ◽  
A Cell ◽  
A Current

A room-temperature synthesized NiFeCe2 electrocatalyst delivered a current density of 10 mA cm−2 at a cell voltage of 1.59 V when used as the electrolyzer.

Controllable synthesis of Cu–Ni–M (M = S, P and Se) hybrid nanoarrays for efficient water splitting reaction

2021 ◽  
Author(s):  
Nannan Chen ◽  
Yanhong Wang ◽  
Xiaoqiang Du ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Controllable Synthesis ◽  
A Cell ◽  
A Current

The results demonstrate that Cu–Ni–S/NF//Cu–Ni–P/NF pairs show superior water splitting performance with only requiring a cell voltage of 1.50 V to achieve a current density of 20 mA cm−2.

scholarly journals Stainless Steel as A Bi-Functional Electrocatalyst—A Top-Down Approach

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2128 ◽  
Author(s):  
Joakim Ekspong ◽  
Thomas Wågberg
Keyword(s):  
Stainless Steel ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Noble Metals ◽  
Cell Voltage ◽  
Production Costs ◽  
Top Down ◽  
Nanosized Catalysts ◽  
Cheap Alternative ◽  
A Cell

For a hydrogen economy to be viable, clean and economical hydrogen production methods are vital. Electrolysis of water is a promising hydrogen production technique with zero emissions, but suffer from relatively high production costs. In order to make electrolysis of water sustainable, abundant, and efficient materials has to replace expensive and scarce noble metals as electrocatalysts in the reaction cells. Herein, we study activated stainless steel as a bi-functional electrocatalyst for the full water splitting reaction by taking advantage of nickel and iron suppressed within the bulk. The final electrocatalyst consists of a stainless steel mesh with a modified surface of layered NiFe nanosheets. By using a top down approach, the nanosheets stay well anchored to the surface and maintain an excellent electrical connection to the bulk structure. At ambient temperature, the activated stainless steel electrodes produce 10 mA/cm2 at a cell voltage of 1.78 V and display an onset for water splitting at 1.68 V in 1M KOH, which is close to benchmarking nanosized catalysts. Furthermore, we use a scalable activation method using no externally added electrocatalyst, which could be a practical and cheap alternative to traditionally catalyst-coated electrodes.

Design and synthesis of integrally structured Ni3N nanosheets/carbon microfibers/Ni3N nanosheets for efficient full water splitting catalysis

2017 ◽  
Vol 5 (19) ◽  
pp. 9377-9390 ◽  
Author(s):  
Tingting Liu ◽  
Mian Li ◽  
Chuanlai Jiao ◽  
Mehboob Hassan ◽  
Xiangjie Bo ◽  
...  
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Electrolysis Cell ◽  
Design And Synthesis ◽  
A Cell ◽  
Carbon Microfibers ◽  
A Current

A (−) Ni3N/CMFs/Ni3N‖Ni3N/CMFs/Ni3N (+) electrolysis cell requires a cell voltage of only 1.65 V to achieve a current density of 20 mA cm−2.

Controllable synthesis of NiO/Ni3S2 hybrid arrays as efficient electrocatalysts for water splitting

2018 ◽  
Vol 42 (22) ◽  
pp. 18201-18207 ◽  
Author(s):  
Xiaoqiang Du ◽  
Qibin Wang ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
Controllable Synthesis ◽  
A Cell ◽  
A Current

NiO/Ni3S2 affords a current density of 10 mA cm−2 in 1.0 M KOH at a cell voltage of 1.59 V, i.e., comparable to the commercial 20 wt% IrO2/C–40 wt% Pt/C couple (1.55 V at 10 mA cm−2).

scholarly journals Amorphization activated ruthenium-tellurium nanorods for efficient water splitting

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Juan Wang ◽  
Lili Han ◽  
Bolong Huang ◽  
Qi Shao ◽  
Huolin L. Xin ◽  
...  
Keyword(s):  
Water Splitting ◽  
Rational Design ◽  
Amorphous Materials ◽  
Theoretical Calculations ◽  
Cell Voltage ◽  
Superior Performance ◽  
Strain Effect ◽  
Local Distortion ◽  
A Cell ◽  
Kinetics Of

AbstractPursuing active and durable water splitting electrocatalysts is of vital significance for solving the sluggish kinetics of the oxygen evolution reaction (OER) process in energy supply. Herein, theoretical calculations identify that the local distortion-strain effect in amorphous RuTe2 system abnormally sensitizes the Te-pπ coupling capability and enhances the electron-transfer of Ru-sites, in which the excellent inter-orbital p-d transfers determine strong electronic activities for boosting OER performance. Thus, a robust electrocatalyst based on amorphous RuTe2 porous nanorods (PNRs) is successfully fabricated. In the acidic water splitting, a-RuTe2 PNRs exhibit a superior performance, which only require a cell voltage of 1.52 V to reach a current density of 10 mA cm−2. Detailed investigations show that the high density of defects combine with oxygen atoms to form RuOxHy species, which are conducive to the OER. This work offers valuable insights for constructing robust electrocatalysts based on theoretical calculations guided by rational design and amorphous materials.

Interfacial Engineering for Design of Novel 2D Cobalt Sulfide-Mxene Heterostructured Catalyst Towards Alkaline Water Splitting

2021 ◽  
Author(s):  
Phan Khanh Linh Tran ◽  
Min Sung Kim ◽  
Thanh Hai Nguyen ◽  
Thanh D Tran ◽  
Nam Hoon Kim ◽  
...  
Keyword(s):  
Water Splitting ◽  
Three Dimensional ◽  
Cell Voltage ◽  
Catalytic Performance ◽  
Cobalt Sulfide ◽  
Current Response ◽  
Interfacial Engineering ◽  
A Cell ◽  
Kinetics Of ◽  
A Current

Abstract In this work, we used an interfacial engineering method to investigate a novel hybrid of two-dimensional cobalt sulfide-Mxene (2D CoS-Mo2TiC2) heterostructure supported by a three-dimensional foam substrate. The modification electronic properties caused by unique interfacial interactions resulted in a significant increase in the number of electroactive sites and charge transfer ability, thereby accelerating kinetics of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in an alkaline medium. The catalyst required overpotential of 248.2 and 310 mV at a current response of 50 mA cm-2 for HER and OER, respectively, along with a remarkable stability. In addition, a two-electrode electrolyzer derived from the developed 2D CoS-Mo2TiC2 catalyst showed a cell voltage of 1.74 V at 10 mA cm-2 and a good stability during 25 h continuous operation. The achieved results were associated to the formation of a unique interfacial heterostructure with the strong interaction between two material phases, which effectively modified electronic structure and surface chemistry, thereby leading to the enhancement of catalytic performance. The study offered a potential route to synthesize new catalyst for green hydrogen production via water splitting.

Oxide/sulfide-based hybrid arrays as robust electrocatalysts for water splitting

2018 ◽  
Vol 47 (30) ◽  
pp. 10273-10280 ◽  
Author(s):  
Xiaoqiang Du ◽  
Qibin Wang ◽  
Yu Li ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
Current Density ◽  
Cell Voltage ◽  
A Cell ◽  
A Current

NiCo2O4/Ni3S2 affords a current density of 10 mA cm−2 in 1.0 M KOH at a cell voltage of 1.58 V, i.e., comparable to that of the commercial 20 wt% IrO2/C–40 wt% Pt/C couple (1.52 V at 10 mA cm−2).

Sign in / Sign up

Export Citation Format

Share Document