In the last decade, layered materials and their 2D counterparts, such as graphene, transition metal chalcogenides or black phosphorus, have been tested for their electrocatalytic properties. The main application is in the hydrogen evolution reaction (HER) and the oxygen reduction reaction (ORR), in which layered materials could possibly replace platinum. Although platinum offers both the lowest overpotential and the highest current density, it is also expensive and rare and has little tolerance to passivation. On the other hand, metal diborides are well known for their high chemical stability and low cost. Surprisingly, until now, only a few electrochemical properties of diborides have been studied. In this paper, we present the study of the electrocatalytic properties of metal borides (namely AlB2, CrB2, HfB2, MgB2, NbB2, TaB2, TiB2, VB2 and ZrB2) towards the HER and ORR together with their structural and chemical characterization.
Bibliographical noteFunding Information:
This work was supported by the project Advanced Functional Nanorobots (reg. no. CZ.02.1.01/0.0/0.0/15_003/0000444 financed by the EFRR). This work was created with the financial support of the Neuron Foundation for science support. This work was supported by Czech Science Foundation (GACR No. 17-11456S) and by specific university research (MSMT No. 20-SVV/2018). The authors were supported by Tier 1 (99/13) and Tier 1 (123/16) grants from the Ministry of Education, Singapore. Support from A*Star grant (No. SERC A1783c0005), Singapore is appreciated.
© 2018 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Materials Science(all)