Efficient electrolysis of water is critical for renewable energy technologies, and achieving this goal through low-cost, low-energy, and environmentally-friendly methods is imperative. The nanomaterials prepared by biomineralization have the characteristics of small particle size, strong stability, low cost, clean and environmental protection. This study utilized sulfate-reducing bacteria (SRB) to prepare oxygen evolution reaction (OER) catalysts based on the principles of biomineralization. To enhance its OER activity, three distinct doping methods were employed based on bacterial biomineralization products (BPs), and a possible biomineralization mechanism of SRB in the preparation of metal sulfides and iron compounds has been proposed. Our investigations demonstrated that Ni-doped biomineralized products hydrothermal treatment yielded an electrocatalyst having outstanding catalytic activity and performance, and it exhibited a small overpotential of 230 mV at a current density of 10 mA cm⁻² as well as a Tafel slope down to 46 mV dec⁻¹ in alkaline solution. This electrode material outperformed the commercial RuO₂ electrocatalyst. The high catalytic activity of the prepared electrocatalyst is ascribed to the additional active sites introduced by the doping of Ni, facile electron transfer, enhanced conductivity, and wettability. Overall, the utilization of the biomineralization method for the catalytic material preparation can considerably facilitate the development of energy conversion and storage processes.

高效电解水对于可再生能源技术至关重要，通过低成本、低能耗、环保的方法实现这一目标势在必行。生物矿化制备的纳米材料具有粒径小、稳定性强、成本低、清洁环保等特点。本研究基于生物矿化原理，利用硫酸盐还原菌（SRB）制备析氧反应（OER）催化剂。为了提高其OER活性，基于细菌生物矿化产物（BP）采用了三种不同的掺杂方法，并提出了SRB在金属硫化物和铁化合物制备中可能的生物矿化机制。⁻²以及碱性溶液中塔菲尔斜率降至 46 mV dec ^{−1 。}该电极材料的性能优于商用RuO ₂电催化剂。所制备的电催化剂的高催化活性归因于Ni掺杂引入的额外活性位点、容易的电子转移、增强的导电性和润湿性。总的来说，利用生物矿化方法制备催化材料可以极大地促进能量转换和存储过程的发展。