Facile synthesis of petal-like NiCo/NiO-CoO/nanoporous carbon composite based on mixed-metallic MOFs and their application for electrocatalytic oxidation of methanol

Unusual Effect of Trace Water on the Structure and Activity of NixCo1−x Electrocatalysts for the Methanol Oxidation Reaction

“…The peaks observed at 777.8 and 793.3 eV correspond to Co 2p 3/2 and Co 2p 1/2 and reflect that the chemical valence of Co is zero. The binding energies of 780.9 and 796.5 eV are assigned to Co 2+ , and the satellite peaks are at 785.5 and 802.3 eV . These peaks of Ni 2+ and Co 2+ indicate the existence of some oxides on the surface.…”

“…The bindinge nergies of 780.9 and7 96.5 eV are assigned to Co 2 + , and the satellite peaks are at 785.5 [47] and 802.3 eV. [10] These peaks of Ni 2 + andC o 2 + indicate the existence of some oxides on the surface. Some additional information can be obtained from the XPS spectra and Ta ble S2 in the Supporting Information.…”

“…Ni‐based catalysts are considered to be the most promising candidates owing to their high poisoning tolerance and low cost. To date, two main ways have been employed to design and tune the Ni‐based catalysts: 1) using catalyst supports such as carbon materials (carbon nanofibers and graphene) and 2) controlling the catalyst morphology, which is related to the active surface of the catalyst …”

“…Ni-based catalysts are considered to be the most promising candidates owing to their high poisoning tolerance and low cost. To date, two main ways have been employed to design and tune the Ni-based catalysts:1 )using catalyst supports such as carbon materials (carbon nanofibers and graphene) [9][10][11] and 2) controlling the catalystm orphology, which is related to the active surface of the catalyst. [12][13][14] Various synthetic methods have been proposed, such as the microemulsion method, [15,16] microwaver adiation synthesis, [17,18] polyol reduction, [19,20] and electrodeposition, [21][22][23] which are effective for the preparation of nickel-based catalysts with variousm orphologies and anisotropy,f or example, Ni-Co nanoflowers, [19,24] nanoneedles, [15] self-assembled Ni-Co nanoparticles, [25] dendrite-like Ni-Cu alloy, [26] and Ni-Co-Sn alloy nanoparticles.…”

CoP‐Doped MOF‐Based Electrocatalyst for pH‐Universal Hydrogen Evolution Reaction

“…As shown in Figure 3b,the Tafel slope of CoP/Co-MOF is 63 mV dec À1 ,higher than that of Pt/C (43 mV dec À1 )b ut much lower than those of CoP (89 mV dec À1 )a nd a-CoP (110 mV dec À1 ). [14] In addition, To further identify the catalysts intrinsic activity toward HER, the double-layer capacitance (C dl )w as probed to estimate the electrochemically active surface areas (ECSA) and the corresponding intrinsic activity.T he CV curves of CoP/Co-MOF,C oP,and a-CoP with different scan rates are shown in Figure S10. [14] In addition, To further identify the catalysts intrinsic activity toward HER, the double-layer capacitance (C dl )w as probed to estimate the electrochemically active surface areas (ECSA) and the corresponding intrinsic activity.T he CV curves of CoP/Co-MOF,C oP,and a-CoP with different scan rates are shown in Figure S10.…”