Efficient and durable electrocatalysts for the oxygen evolution reaction (OER) are vital for advancing renewable energy technologies, particularly in water-splitting systems. Herein, we report a novel surface engineering strategy to enhance the OER performance of Bi 2 Ru 2 O 7 (BRO) pyrochlore oxide by constructing amorphous/crystalline heterostructures. Using four surface treatment agents—nitric acid, hydrogen peroxide, vitamin C, and sodium borohydride—we successfully induced an amorphous RuOx layer on crystalline BRO, significantly increas...
