Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 24, Issue 10, Pages 6087-6092Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cp05236e
Keywords
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Funding
- NSFC [21671149, 21571140, 21531005, 21703156, 21801186]
- 973 Program [2014CB845601]
- Program for Innovative Research Team in University of Tianjin [TD13-5074]
- Natural Science Foundation of Tianjin [18JCQNJC76000]
- Science & Technology Development Fund of Tianjin Education Commission for Higher Education [2017KJ122]
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This study investigated the crystal plane effects of NiO on the electrocatalytic OER activity, showing that NiO nanobelts with exposed {110} crystal planes exhibit higher OER activity due to their high catalytic ability and fast charge transfer kinetics. By selectively exposing specific crystal planes, more efficient OER electrocatalysts can be designed.
The electrocatalytic oxygen evolution reaction (OER) is necessary and challenging for converting renewable electricity into clean fuels, because of its complex proton coupled multielectron transfer process. Herein, we investigated the crystal plane effects of NiO on the electrocatalytic OER activity through combining experimental studies and theoretical calculations. The experimental results reveal that NiO nanobelts with exposed {110} crystal planes show much higher OER activity than NiO nanoplates with exposed {111} planes. The efficient OER activity of the {110} crystal planes comes from their intrinsically high catalytic ability and fast charge transfer kinetics. Density functional theory (DFT) shows that the {110} crystal planes possess a lower theoretical overpotential value for the OER, leading to a high electrocatalytic performance. This research broadens our vision to design efficient OER electrocatalysts by the selective exposure of specific crystal planes.
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