IrCo nanocacti on Co_xS_y nanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media

Abstract

Developing highly efficient Ir-based electrocatalysts for oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on...

Fabrication of Cerium-Doped CoMoP/MoP@C Heterogeneous Nanorods with High Performance for Overall Water Splitting

“…As an energy with high energy density, hydrogen energy has attracted great interest because of its renewability and cleanliness, which is seen as the most potential candidate to substitute traditional energy. − Hydrogen production by water electrolysis is a feasible and low-cost choice. − However, high-efficient and stable electrocatalysts are in high demand due to sluggish kinetics and huge energy loss during water splitting. , Currently, among noble metal-based electrocatalysts, Pt/C is the most active for the HER, while IrO 2 and RuO 2 show excellent OER performance. − Unfortunately, rare reserves and high prices limit their large-scale commercial applications. , Recently, as latent substitutes for high-priced catalysts, transition metal phosphides (TMPs) have aroused immense concern. , …”

Dopants in the Design of Noble Metal Nanoparticle Electrocatalysts and their Effect on Surface Energy and Coordination Chemistry at the Nanocrystal Surface

“…For example, Kim et al recently reported that the IrO x phase is considerably stabilized by S-dopants, which were formed by in situ doping of S from electrochemical oxidation of Co x S y @IrCo heterostructured nanocage structure (ICS NC, Figure 12g). [91] STEM-EDX, Raman, and EXAFS analyses confirmed that the S atoms in the Co x S y nanocages migrated to the Ir oxide lattice during the OER, forming hollow S-doped IrO x (Figure 12h). To verify the effect of the S dopants, IrCo hollow NPs (IC HNP) were also prepared, which in turn were transformed into hollow IrO x under the same OER conditions.…”

“…Reproduced with permission. [91] Copyright 2020, Royal Society of Chemistry.…”

“…i) OER chronopotentiometry curves of the catalysts at a current density of 10 mA cm -2 . Reproduced with permission [91]. Copyright 2020, Royal Society of Chemistry.…”

Modulating the Local Coordination Environment of Single‐Atom Catalysts for Enhanced Catalytic Performance in Hydrogen/Oxygen Evolution Reaction

“…[11,12] The high costs and limited resources of noble metals have mandated researchers to seek alternatives in various affordable, non-noble metal-based electrocatalysts, like transition metal oxides (hydroxides), sulfides, phosphides, nitrides and carbides, and functional metal-free carbon composites. [13][14][15][16][17][18][19][20][21][22] However, these alternatives offer acceptable OER and HER catalytic performances when used in alkaline and acidic solutions, respectively, thereby limiting their practical applications. Besides, these materials are susceptible to rapid particle agglomeration during electrochemical operation, leading to limited atomic utilization efficiency.…”