Phosphine-free avenue to Co₂P nanoparticle encapsulated N,P co-doped CNTs: a novel non-enzymatic glucose sensor and an efficient electrocatalyst for oxygen evolution reaction

Abstract

A novel one-step, one-pot strategy to synthesize Co2P encapsulated N,P dual doped carbon nanotubes (Co2P/NPCNTs) is developed via a g-C3N4 intermediated approach.

Co2P Nanoparticles Wrapped in Amorphous Porous Carbon as an Efficient and Stable Catalyst for Water Oxidation

“…The sharp diffraction peaks at 32.9, 40.7, 40.9, 43.3, 44.0, 48.7, 50.4, 52.0, 57.2, 71.0, and 75.3° can be indexed to the crystal planes of (111), (121), (201), (211), (130), (031), (310), (002), (311), (132), and (312) of Co 2 P (JCPDS no. 32-0306; Dutta et al, 2016 ; Masa et al, 2016 ; Das et al, 2017 ), respectively, firmly confirming that Co 2 P nanoparticles was successfully prepared by our method. The wide diffraction peak located at ~26.4° was considered to derive from the carbon support (Wang et al, 2017 ).…”

Cobalt Phosphide Composite Encapsulated within N,P‐Doped Carbon Nanotubes for Synergistic Oxygen Evolution

“…The peak at 285.5 eV, which is the binding energy of the CP matrix, is attributed to the sp 2 C atoms bonded to P in an aromatic ring. In addition, the peaks at 287 eV suggest the formation of sp 3 C atoms bonded to NH 2 groups, with the peak at 288.8 eV ascribed to the π→π* transition . For the N 1s spectrum (Figure d), the peaks are centered at 399.6, 400.5, and 401.9 eV, corresponding to pyridinic‐N, pyrolic‐N, and graphitic‐N, respectively.…”

“…To achieve excellent electrocatalytic performance close to or exceeding that of IrO 2 or RuO 2 , the approach of enhancing the electrical conductivity is typically used. Various binary CoP x nanostructures have been hybridized with carbonaceous supports such as sandwich‐like carbon/CoP/carbon derived from a carbon‐encapsulated Co‐based nanosheet; CoP nanoparticles@N‐doped carbon polyhedral obtained by the simultaneous pyrolysis and phosphidation of a preformed Co‐based zeolitic imidazolate framework (ZIF‐67); Co 2 P nanoparticles@N,P‐doped carbon nanotubes (CNTs) formed by pyrolyzing triphenylphosphine/melamine; and metal–organic framework‐derived CoP nanoparticles/reduced graphene oxide (RGO); as well as CoP@RGO fabricated by pyrolyzing phytic acid cross‐linked metal complexes . The CoP x /carbon composites indeed exhibit greatly enhanced electrocatalytic activities and stabilities; however, their electrocatalytic performance is not satisfactory.…”

Eutectic Synthesis of High‐Entropy Metal Phosphides for Electrocatalytic Water Splitting

“…In Figure a, the high‐resolution Co 2p spectrum displays two spin‐orbit doublets along with two shakeup satellites (denoted as “Sat.”). The binding energies at 782.1 and 798.0 eV are assigned to Co 2p 3/2 and Co 2p 1/2 , respectively, which demonstrate the existence of Co−P in the HEMP nanosheets . For the Cr 2p spectrum (Figure b), the peaks of Cr 2p 3/2 and Cr 2p 1/2 are located at 577.6 and 587.2 eV, respectively, which can be assigned to the Cr in Cr−P .…”