Ultrafine and highly-dispersed bimetal Ni2P/Co2P encapsulated by hollow N-doped carbon nanospheres for efficient hydrogen evolution

Tailoring electron transfer with Ce integration in ultrathin Co(OH)2 nanosheets by fast microwave for oxygen evolution reaction

“…The Ce 3d spectra (Fig. 4b) contains eight characteristic peaks of Ce 3+ and Ce 4+ states, which can be assigned to CeO X , implying the multivalence of Ce [31,32]. The generated Ce 3+ , which implies the close interaction between CeO 2 and Co(OH) 2 , can optimize the binding energy of OH*, thus activating CeO 2 to activated OER catalysts.…”

Fe(Co)OOH Dynamically Stable Interface Based on Self-Sacrificial Reconstruction for Long-Term Electrochemical Water Oxidation

“…As shown in Figure d, the FeOOH–CoMoO 4 -0.01 sample affords a much smaller R ct value (0.46 Ω) with the faster charge-transfer ability than FeOOH–CoMoO 4 -0.1 (2.13 Ω), FeOOH–CoMoO 4 -1 (4.27 Ω), and CoMoO 4 (3.63 Ω), which also illustrates the quick OER reaction kinetics of the FeOOH–CoMoO 4 -0.01 sample (Table S2). Moreover, ECSA of the abovementioned catalysts is further evaluated through electrochemical double-layer capacitance ( C dl ), which are tested by CV from 0.3 to 0.4 V (vs SCE) at the scan rates ranging from 40 to 120 mV s –1 (Figure S13). As expected, Figure e shows that the highest C dl value (51.3 mF cm –2 ) is observed in the FeOOH–CoMoO 4 -0.01 sample, which is almost 2.5-fold that of FeOOH–CoMoO 4 -1 and 1.9-fold that of the CoMoO 4 sample, revealing much more exposed electrochemically active sites for OER (Table S3).…”

“…As shown in Figure 3d S2). 39 Moreover, ECSA of the abovementioned catalysts is further evaluated through electrochemical doublelayer capacitance (C dl ), which are tested by CV from 0.3 to 0.4 V (vs SCE) at the scan rates ranging from 40 to 120 mV s −1 (Figure S13). As expected, Figure 3e shows that the highest C dl value (51.3 mF cm −2 ) is observed in the FeOOH−CoMoO 4 -0.01 sample, which is almost 2.5-fold that of FeOOH− CoMoO 4 -1 and 1.9-fold that of the CoMoO 4 sample, revealing much more exposed electrochemically active sites for OER (Table S3).…”

Atomically-dispersed NiN4–Cl active sites with axial Ni–Cl coordination for accelerating electrocatalytic hydrogen evolution

“…Therefore, it is urgently required to develop a stable, economical and efficient electrocatalyst to solve these problems. 4,5 Platinum-based catalysts are the most effective catalysts for the hydrogen evolution reaction (HER) at present, but their high cost, low storage and poor stability hinder the industrial applications. [6][7][8] Single-atom catalysts (SACs) exhibit maximum atomic utilization, which can not only expose more active sites, [9][10][11] but also increase the intrinsic catalytic activity of the catalyst in the low coordination environment with unsaturated metal atoms.…”