催化电子捐赠的机器学习描述符: 预测氮固定中的吸附能和极限电位
赵迎 , 杨海迪 , 柴玉春 , 高帅帅 , 原鹏飞 , 陈雪波
高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (02) : 97 -105.
催化电子捐赠的机器学习描述符: 预测氮固定中的吸附能和极限电位
Machine Learning Descriptors for Catalytic Electron Donation: Predicting Adsorption Energies and Limiting Potentials in Nitrogen Fixation
通过高通量密度泛函计算筛选出一系列具有氮还原反应(NRR)活性的B和双金属原子组成的CN-B@M2催化剂. CN-B@Fe2, CN-B@Tc2, CN-B@Os2和CN-B@Re2被认为是具有良好选择性和NRR活性的催化剂, 其极限电位(UL)分别为-0.24, -0.34, -0.31和-0.38 V. 计算结果表明, N2在B@M2上的吸附呈周期性演变, 吸附构型和能量受d带中心调节. UL随转移电荷呈火山型分布. 具有中等电子给体能力(中等电荷转移)的B@M2催化剂表现出优异的NRR活性. 通过量化催化剂的原子电子特性和拓扑结构, 构建了用于描述给电子能力的描述 符Φ. 结果表明, 给电子能力与氮还原反应的极限电位呈火山关系. 使用描述符Φ和催化剂的内在特性作为特征预测了吸附能和极限电位, 由于R2值为0.99, 梯度提升回归(GBR)被认为是构建机器学习预测模型的最恰当方法.
In this work, a series of CN-B@M2 catalysts composed of B and bimetallic atoms with nitrogen reduction reaction(NRR) activity were screened by high-throughput density functional calculations. CN-B@Fe2, CN-B@Tc2, CN-B@Os2, and CN-B@Re2 were considered as catalysts with good selectivity and NRR activity, with the limiting potentials(UL) of -0.24, -0.34, -0.31 and -0.38 V, respectively. Calculation results show that the adsorption configuration of N2 at B@M2 shows a periodic evolution, and adsorption configuration and energy are regulated by d-band center. UL shows a volcanic distribution with adsorbed N2 charge. B@M2 catalyst with moderate electron donor capacity shows excellent NRR activity. Descriptor Φ used to describe electron donating ability is constructed by quantifying atom electronic properties and topology structure of catalysts. Φ shows a strong linear correlation with adsorption energy, and describes limiting potential of NRR by volcano diagram. Φ and intrinsic properties of catalyst are used as features to predict the adsorption energy and UL. Gradient boosting regression(GBR) is considered the most appropriate method for building a machine learning prediction model due to an R2 of 0.99. This work provides novel insights into the design of rational and efficient NRR catalysts and construction of their descriptors.
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国家自然科学基金(22503078)
山东省重点研发计划项目-竞争性创新平台(2024CXPT036)
山东省泰山学者工程项目(tstp20240844)
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