期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 3, 页码 1297-1303出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c07700
关键词
oxygen evolution reaction; CdP2-CDs-CoP; hierarchical; defects; carbon quantum dots
资金
- National Natural Science Foundation of China [21972111, 21773188]
- Fundamental Research Funds for the Central Universities [XDJK2019B052, XDJK2019AA002]
- Venture & Innovation Support Program for Chongqing Overseas Returnees [cx2019073]
- Natural Science Foundation of Chongqing [cstc2018jcyjAX0714]
- Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and Devices
- Chongqing Key Laboratory for Advanced Materials and Technologies
Hierarchical CdP2-CDs-CoP nanoarrays were fabricated by combining negatively charged carbon quantum dots (CDs) with positively charged Co and Cd ions, trapping trace CdP2 on the surface to enrich defects and active sites. As a robust OER electrocatalyst, the CdP2-CDs-CoP nanoarray demonstrated a lower overpotential and higher current density compared to commercial RuO2.
Designing low-cost and high-activity electrocatalysts is significant to enhance the slow kinetic process of oxygen evolution reaction (OER). Inspired by the Lego game, hierarchical CdP2-CDs-CoP nanoarrays were fabricated by combining negatively charged carbon quantum dots (CDs) with positively charged Co and Cd ions. Because of the low evaporation temperature of Cd and relatively high solubility product (K-sp) of Cd(OH)(2), trace CdP2 is trapped on the surface of CdP2-CDs-CoP nanoarrays. When coupled with CDs, CdP2 enriches the defects and active sites of catalysts. The CdP2-CDs-CoP nanoarray, as a robust OER electrocatalyst, delivers an overpotential of 285 mV to drive a current density of 10 mA cm(-2), demonstrating its superiority over commercial RuO2.
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