Abstract
Application of transition metal boride(TMB)catalysts towards hydrolysis of NaBH4 holds great signifi-cance to help relieve the energy crisis.Herein,we present a facile and versatile metal-organic framework(MOF)assisted strategy to prepare Co2B-CoPOx with massive boron vacancies by introducing phytic acid(PA)cross-linked Co complexes that are acquired from reaction of PA and ZIF-67 into cobalt boride.The PA etching effectively breaks down the structure of ZIF-67 to create more vacancies,favoring the maxi-mal exposure of active sites and elevation of catalytic activity.Experimental results demonstrate a drastic electronic interaction between Co and the dopant phosphorous(P),thereby the robustly electronega-tive P induces electron redistribution around the metal species,which facilitates the dissociation of B-H bond and the adsorption of H2O molecules.The vacancy-rich Co2B-CoPOx catalyst exhibits scalable per-formance,characterized by a high hydrogen generation rate(HGR)of 7716.7 mL min-1 g-1 and a low activation energy(Ea)of 44.9kJ/mol,rivaling state-of-the-art catalysts.This work provides valuable in-sights for the development of advanced catalysts through P doping and boron vacancy engineering and the design of efficient and sustainable energy conversion systems.
基金项目
国家自然科学基金(21965005)
广西自然科学基金(2021GXNSFAA076001)
Guangxi Tech-nology Base and Talent Subject(GUIKE AD18126001)
Guangxi Tech-nology Base and Talent Subject(GUIKE AD20297039)
Innovation Project of Guangxi Graduate Educa-tion(YCSW2023140)
Innovation Project of Guangxi Graduate Educa-tion(YCBZ2023062)
NETL
NSTL
万方数据