文献类型：期刊文献

英文题名：Interface engineering of ultrathin nickel metallene on titanium dioxide nanosheets for efficient photocatalytic hydrogen evolution

作者：Qian, An[1];Han, Xin[1];Zeng, Xin[1];Su, Jie[1];Fan, Minwei[2];Zhang, Chong[1];Yu, Jihui[1];Pu, Xin[3];Liu, Jichang[2,3];Liu, Changjun[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shihezi Univ, Sch Chem & Chem Engn, State Key Lab Incubat Base Green Proc Chem Engn, Shihezi 832003, Peoples R China

年份：2026

卷号：724

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20262721023709);Scopus(收录号：2-s2.0-105043393296);WOS:【SCI-EXPANDED(收录号:WOS:001816164700001)】；

语种：英文

外文关键词：Ni metallene; TiO2; 2D structure; Co-catalyst; Photocatalytic hydrogen production

摘要：Interfacial charge transfer plays a decisive role in determining photocatalytic hydrogen evolution efficiency, yet its potential remains underexplored in photocatalyst structural design. Here, an ultrathin two-dimensional (2D) Ni metallene is synthesized and employed as a cocatalyst with titanium dioxide(TiO2) nanosheets for the first time, constructing an efficient 2D/2D photocatalytic architecture. Distinct from conventional approaches that rely on noble-metal loading or multimetallic synergy, this system achieves a pronounced activity enhancement through the structural engineering of earth-abundant Ni. The resulting Ni metallene/titanium dioxide(Ni-ene/TiO2) composite delivers a hydrogen evolution rate of 8277 & micro;mol h-1 g-1 under simulated solar irradiation, representing a 24-fold improvement over pristine TiO2. The superior activity is mainly ascribed to the 2D metallic Ni metallene, which establishes a large-area interfacial contact with TiO2, in contrast to conventional Ni nanoparticles with limited interfacial coupling, a conclusion further supported by density functional theory calculations. Notably, Ni metallene also exhibits effective cocatalytic activity when loaded onto 2D graphitic carbon nitride (g-C3N4) nanosheets, indicating that its interfacial advantages are transferable beyond TiO2-based systems. Overall, this work establishes interfacial structural engineering of earth-abundant nickel as a powerful strategy for boosting photocatalytic hydrogen evolution, offering a new paradigm for designing high-performance noble-metal-free cocatalysts through interface-driven optimization.