Trifunctional Single-Atomic Ru Sites Enable Efficient Overall Water Splitting and Oxygen Reduction in Acidic Media

被引：193

作者：

Peng, Xianyun ^{[1
,2
]}

Zhao, Shunzheng ^{[3
]}

Mi, Yuying ^{[1
,2
]}

Han, Lili ^{[4
]}

Liu, Xijun ^{[1
,2
]}

Qi, Defeng ^{[1
,2
]}

Sun, Jiaqiang ^{[5
]}

Liu, Yifan ^{[6
]}

Bao, Haihong ^{[1
,2
]}

Zhuo, Longchao ^{[7
]}

Xin, Huolin L. ^{[4
]}

Luo, Jun ^{[1
,2
]}

Sun, Xiaoming ^{[8
]}

机构：

[1] Tianjin Univ Technol, Ctr Electron Microscopy, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Sch Mat Sci & Engn, Inst New Energy Mat & Low Carbon Technol, Tianjin Key Lab Adv Funct Porous Mat, Tianjin 300384, Peoples R China

[3] Univ Sci & Technol Beijing, Dept Environm Engn, Beijing 100083, Peoples R China

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

[6] Shenzhen Univ, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

[7] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

[8] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

SMALL | 2020年 / 16卷 / 33期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

acidic environment; overall water splitting; oxygen reduction; single-atomic Ru sites; trifunctional catalysts; HYDROGEN EVOLUTION; FUEL-CELLS; METAL-FREE; FE SITES; ELECTROCATALYSTS; ELECTRODE; CATALYST; OXIDATION; GRAPHENE;

D O I：

10.1002/smll.202002888

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Development of cost-effective, active trifunctional catalysts for acidic oxygen reduction (ORR) as well as hydrogen and oxygen evolution reactions (HER and OER, respectively) is highly desirable, albeit challenging. Herein, single-atomic Ru sites anchored onto Ti(3)C(2)T(x)MXene nanosheets are first reported to serve as trifunctional electrocatalysts for simultaneously catalyzing acidic HER, OER, and ORR. A half-wave potential of 0.80 V for ORR and small overpotentials of 290 and 70 mV for OER and HER, respectively, at 10 mA cm(-2)are achieved. Hence, a low cell voltage of 1.56 V is required for the acidic overall water splitting. The maximum power density of an H-2-O(2)fuel cell using the as-prepared catalyst can reach as high as 941 mW cm(-2). Theoretical calculations reveal that isolated Ru-O(2)sites can effectively optimize the adsorption of reactants/intermediates and lower the energy barriers for the potential-determining steps, thereby accelerating the HER, ORR, and OER kinetics.

引用

页数：10

共 56 条

[1] Multifunctional Mo-N/C@MoS2 Electrocatalysts for HER, OER, ORR, and Zn-Air Batteries [J].