P. Karfa等人通过简单的溶胶-凝胶法制备了多种形貌的Er₂Si₂O₇修饰的IrO_x。在催化HER反应中不同形貌的材料具有不同催化活性，其中具有较“锋利” 边角位的立方块活性最高，并且在pH=0-14范围能都表现出较高的活性。在0.5 M H₂SO₄, 1.0 M KOH, and 2.0 M PBS溶液中的过电势和Tafel斜率分别为 130 mV and 49 mV/dec, 170 mV and 59 mV/dec, and 190 mV and 67 mV/dec。

Paramita Karfa*, et al. Shape-Dependent Electrocatalytic Activity of Iridium Oxide Decorated Erbium Pyrosilicate toward the Hydrogen Evolution Reaction over the Entire pH Range

ACS Catal., 2018, 8, pp 8830–8843 DOI: 10.1021/acscatal.8b01363

https://pubs.acs.org/doi/10.1021/acscatal.8b01363#