Intercalation Synthesis of Prussian Blue Analogue Nanocone and Their Conversion into Fe-Doped Co_xP Nanocone for Enhanced Hydrogen Evolution

Abstract

Compared with the monometallic phosphides, bimetallic phosphides can further improve the catalytic performance for hydrogen evolution reaction (HER). As such, the rational design and facile synthesis of bimetallicbased phosphides with well-controlled architectures and compositions is of scientific and technological importance. In this work, Fe−Co Prussian blue analogue (PBA) nanocones (NCs) have been successfully fabricated via an intercalation reaction strategy by utilizing layer structured α-Co(OH) 2 NCs as self-sacrificing templates. After calcination and phosphorization process, Fe−Co PBA NCs can be converted to Fe-doped Co x P NCs without obvious shrinkage. Electrochemical tests show that Fe incorporation can effectively promote the electrocatalytic activities of Co x P. This simple and effective method will be of benefit for the development of other functional Co-based bimetallic compounds. Furthermore, this strategy can possibly be extended to fabricate a series of PBA materials with special structure and novel morphology, which can serve as a promising platform for diverse applications, especially in energy storage and conversion.

Interface-strengthened CoP nanosheet array with Co2P nanoparticles as efficient electrocatalysts for overall water splitting

“…Two peaks located at 129.9 and 129 eV represent P 2 p 1/2 and P 2 p 3/2 peaks of the CoP/Co 2 P, respectively [17,23,34] . The strong peak at 134.2 eV corresponds to oxidized P species arising from unavoidable exposure in the air [35] . Meanwhile, the O 1 s spectra in Fig.…”

Heteroatom‐Doping of Non‐Noble Metal‐Based Catalysts for Electrocatalytic Hydrogen Evolution: An Electronic Structure Tuning Strategy

“…The followed experimental research confirms the potential of Fe doped TMPs catalysts for high‐performance HER catalysis. [ 34c,36 ] Tang et al. fabricated Fe‐doped CoP nanowire array grown on Ti foil, [ 14 ] it was found that strong electron interactions between Fe and Co atoms occurred, as demonstrated by the binding energy shifting of the core levels of Co 2p and P 2p in Fe‐CoP toward lower energies.…”

Sub‐Nanometer‐Sized Iridium Species Decorated on Mesoporous Co3O4 for Electrocatalytic Oxygen Evolution

“…Besides, the crystalline structures of the synthesized Ir−Co 3 O 4 are examined by wide‐angle X‐ray diffraction (WXRD). As seen in Figure b, all diffraction peaks are assigned to the Co 3 O 4 according to JCPDS PDF 43‐1003, demonstrating that the cobalt precursor is completely turned into cobalt oxide after calcination . Meanwhile, no peaks assignable to metallic Ir or Ir oxides can be observed.…”