Citation: Chenhui Niu, Yixin Zhang, Jing Dong, Ruixue Yuan, Wei Kou, Lianbin Xu. 3D ordered macro-/mesoporous Ni_xCo_100-x alloys as high-performance bifunctional electrocatalysts for overall water splitting[J]. Chinese Chemical Letters, ;2021, 32(8): 2484-2488. doi: 10.1016/j.cclet.2020.12.045 shu

3D ordered macro-/mesoporous Ni_xCo_100-x alloys as high-performance bifunctional electrocatalysts for overall water splitting

Chenhui Niu ^a ,
Yixin Zhang ^a ,
Jing Dong ^a ,
Ruixue Yuan ^a ,
Wei Kou ^a ,
Lianbin Xu ^{a, b,,}

a.
State Key Laboratory of Organic−Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
b.
Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author: Lianbin Xu, xulb@mail.buct.edu.cn
Received Date: 15 October 2020
Revised Date: 20 November 2020
Accepted Date: 23 December 2020
Available Online: 29 December 2020

Figures(4)

Electrochemical water splitting is a facile and effective route to generate pure hydrogen and oxygen. However, the sluggish kinetics of hydrogen evolution reaction (HER) and especially oxygen evolution reaction (OER) hinder the water splitting efficiency. Meanwhile, the high-cost of noble-metal catalysts limit their actual application. It is thus highly urgent to exploit an economical and earth-abundant bifunctional HER and OER electrocatalyst to simplify procedure and reduce cost. Herein, we synthesize the three-dimensionally ordered macro-/mesoporous (3DOM/m) Ni_xCo_100-x alloys with distinctive structure and large surface area via a dual-templating technique. Among them, the 3DOM/m Ni₆₁Co₃₉ shows the lowest overpotentials of 121 mV and 241 mV at 10 mA/cm² for HER and OER, respectively. Furthermore, when employed for water splitting, the Ni₆₁Co₃₉ only requires 1.60 V to approach 10 mA/cm² and presents excellent stability. These encouraging performances of the Ni₆₁Co₃₉ render it a promising bifunctional catalyst for overall water splitting.
- Macro-/mesoporous structure,
- Ni-Co alloys,
- Dual-templating technique,
- Electrocatalysts,
- Water splitting
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

3D ordered macro-/mesoporous NixCo100-x alloys as high-performance bifunctional electrocatalysts for overall water splitting

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通讯作者: 陈斌, bchen63@163.com

3D ordered macro-/mesoporous Ni_xCo_100-x alloys as high-performance bifunctional electrocatalysts for overall water splitting