Sun Lu-Han, Li Qi-Yuan, Zhang Shi-Nan, Xu Dong, Xue Zhong-Hua, Su Hui, Lin Xiu, Zhai Guang-Yao, Gao Peng, Hirano Shin-Ichi, Chen Jie-Sheng, Li Xin-Hao
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Hirano Institute for Materials Innovation, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Angew Chem Int Ed Engl. 2021 Dec 1;60(49):25766-25770. doi: 10.1002/anie.202111920. Epub 2021 Nov 3.
Platinum (Pt) is the most effective bench-marked catalyst for producing renewable and clean hydrogen energy by electrochemical water splitting. There is demand for high HER catalytic activity to achieve efficient utilization and minimize the loading of Pt in catalysts. In this work, we significantly boost the HER mass activity of Pt nanoparticles in Pt /Co to 8.3 times higher than that of commercial Pt/C by using Co/NC heterojunctions as a heterogeneous version of electron donors. The highly coupled interfaces between Co/NC and Pt metal enrich the electron density of Pt nanoparticles to facilitate the adsorption of H , the dissociation of Pt-H bonds and H release, giving the lowest HER overpotential of 6.9 mV vs. RHE at 10 mA cm in acid among reported HER electrocatalysts. Given the easy scale-up synthesis due to the stabilization of ultrafine Pt nanoparticles by Co/NC solid ligands, Pt /Co can even be a promising substitute for commercial Pt/C for practical applications.
铂（Pt）是通过电化学水分解生产可再生清洁能源氢气最有效的基准催化剂。为了实现高效利用并最小化催化剂中Pt的负载量，需要具有高析氢反应（HER）催化活性。在这项工作中，我们通过使用Co/NC异质结作为电子供体的异质形式，将Pt/Co中Pt纳米颗粒的HER质量活性显著提高到比商业Pt/C高8.3倍。Co/NC和Pt金属之间高度耦合的界面增加了Pt纳米颗粒的电子密度，促进了H的吸附、Pt-H键的解离和H的释放，在报道的HER电催化剂中，在酸性条件下10 mA cm时相对于可逆氢电极（RHE）的HER过电位最低，为6.9 mV。由于Co/NC固体配体对超细Pt纳米颗粒的稳定作用，易于放大合成，Pt/Co甚至有望在实际应用中替代商业Pt/C。
