State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, People's Republic of China.
State Key Laboratory of Optoelectronic Materials and Technologies, Nanotechnology Research Center, School of Materials Science & Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, People's Republic of China.
J Colloid Interface Sci. 2019 Jan 15;534:55-63. doi: 10.1016/j.jcis.2018.09.017. Epub 2018 Sep 6.
The CoP@NiCoO bi-functional electrocatalyst was fabricated for hydrogen evolution reaction and oxygen evolution reaction in acidic, neutral and alkaline media. The CoP@NiCoO in alkaline media exhibites an extremely low overpotential of 170 mV in oxygen evolution to achieve a current density of 10 mA cm and produces stable water splitting nearly 30 h. The anchored-CoP can enhance the electrochemical performance of pristine NiCoO as well as increase the tolerance in acidic media of NiCoO. Additional, the CoP is oxidized to oxides/hydroxides species during the electrocatalytic reaction, which acts as the active centers of the electrocatalysis. The CoP@NiCoO catalyst can be used as an effective bifunctional synergistic center in a wide range of pH values (from 0 to 14).
CoP@NiCoO 双功能电催化剂被制备用于在酸性、中性和碱性介质中的析氢反应和析氧反应。在碱性介质中，CoP@NiCoO 表现出极低的析氧过电位 170 mV，实现了 10 mA cm 的电流密度，并稳定地进行近 30 h 的水分解。锚定的 CoP 可以增强原始 NiCoO 的电化学性能，并增加 NiCoO 在酸性介质中的耐受性。此外，在电催化反应过程中，CoP 被氧化为氧化物/氢氧化物物种，这些物种充当电催化的活性中心。CoP@NiCoO 催化剂可以作为一个有效的双功能协同中心，在很宽的 pH 值范围（从 0 到 14）内使用。
