Nitrogen-doped graphene aerogel-supported ruthenium nanocrystals for pH-universal hydrogen evolution reaction

被引:153
作者
Ding, Yu [1 ]
Cao, Kai-Wen [1 ]
He, Jia-Wei [1 ]
Li, Fu-Min [1 ]
Huang, Hao [2 ]
Chen, Pei [1 ]
Chen, Yu [1 ]
机构
[1] Shaanxi Normal Univ, Key Lab Appl Surface & Colloid Chem,Minist Educ, Shaanxi Key Lab Adv Energy Devices,Sch Mat Sci &, Shaanxi Engn Lab Adv Energy Technol,Key Lab Macro, Xian 710062, Shaanxi, Peoples R China
[2] Jinhua Adv Res Inst, Sch Sustainable Energy Mat & Sci, Jinhua 321000, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Water electrolysis; Graphene aerogels; Nitrogen doping; Ruthenium nanocrystals; Hydrogen evolution reaction; HIGHLY EFFICIENT; CARBON; ELECTROCATALYST; NANOPARTICLES; REDUCTION; NANOWIRES; CATALYST; HOLLOW; LAYER; OXIDE;
D O I
10.1016/S1872-2067(21)63977-3
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The design and synthesis of high-performance and low-cost electrocatalysts for the hydrogen evolution reaction (HER), a key half-reaction in water electrolysis, are essential. Owing to their modest hydrogen adsorption energy, ruthenium (Ru)-based nanomaterials are considered outstanding candidates to replace the expensive platinum (Pt)-based HER electrocatalysts. In this study, we developed an adsorption-pyrolysis method to construct nitrogen (N)-doped graphene aerogel (N-GA)-supported ultrafine Ru nanocrystal (Ru-NC) nanocomposites (Ru-NCs/N-GA). The particle size of the Ru-NCs and the conductivity of the N-GA substrate can be controlled by varying the pyrolysis temperature. Optimal experiments reveal revealed that 10 wt% Ru-NCs/N-GA nanocomposites require overpotentials of only 52 and 36 mV to achieve a current density of 10 mA cm???2 in 1 mol/L HClO4 and 1 mol/L KOH electrolytes for HER, respectively, which is comparable to 20 wt% Pt/C electrocatalyst. Benefiting from the ultrafine size and uniform dispersion of the Ru-NCs, the synergy between Ru and the highly conductive substrate, and the anchoring effect of the N atom, the Ru-NCs/N-GA nanocomposites exhibit excellent activity and durability in the pH-universal HER, thereby opening a new avenue for the production of commercial HER electrocatalysts. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:1535 / 1543
页数:9
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