In situ sulfidation induced a Bi2S3 heterogeneous phase on CuBi2O4 for boosting photoelectrochemical ammonia production

CuBi 2 O 4 /Bi 2 S 3 with atomic level connectivity was prepared using a surface sulfurization strategy. CuBi 2 O 4 /Bi 2 S 3 achieved an NH 3 yield of 33.69 μg h −1 cm −2 at 0 V vs. RHE, with a selectivity 74 times higher for NH 3 than for NO 2 − .