期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 10, 页码 6117-6122出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta12008a
关键词
-
资金
- National Natural Science Foundation of China [22072015]
- Shanghai Scientific and Technological Innovation Project [18JC1410604]
The study introduces NiS2 nanosheets as an efficient electrocatalyst for the 2e(-) ORR under acidic conditions, showing high selectivity and yield rate.
The selective two-electron O-2 reduction reaction (2e(-) ORR) represents a green, mild, and on-site means of synthesizing H2O2. However, its practical feasibility depends on the development of advanced electrocatalysts, and limited experimental work has been done on non-precious-metal-based materials for the H2O2 electrogeneration in acids. Our study here introduces NiS2 nanosheets for the first time as an efficient electrocatalyst for the 2e(-) ORR under acidic conditions. In 0.05 M H2SO4, the NiS2 catalyst shows an onset overpotential of similar to 130 mV and offers high selectivity (H2O2 percentage up to 99%). Moreover, the NiS2 catalyst attains the largest faradaic efficiency of 98% and the highest H2O2 yield rate of 109 ppm h(-1) at 0.456 V and 0.156 V in the H-cell testing, respectively. The catalytic mechanism is revealed by theoretical calculations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据