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

来源：

CHINESE JOURNAL OF CATALYSIS | 2022年 / 43卷 / 06期

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

页码：1535 / 1543

页数：9