A RuCoBO Nanocomposite for Highly Efficient and Stable Electrocatalytic Seawater Splitting

Abstract

Efficient and stable electrocatalysts are critically needed for the development of practical overall seawater splitting. The nanocomposite of RuCoBO has been rationally engineered to be an electrocatalyst that fits these criteria. The study has shown that a calcinated RuCoBO-based nanocomposite (Ru2Co1BO-350) exhibits an extremely high catalytic activity for H2 and O2 production in alkaline seawater (overpotentials of 14 mV for H2 evolution and 219 mV for O2 evolution) as well as a record low cell voltage (1.466 V@10 mA cm–2) and long-term stability (230 h @50 mA cm–2 and @100 mA cm–2) for seawater splitting. The results show that surface reconstruction of Ru2Co1BO-350 occurs during hydrogen evolution reaction and oxygen evolution reaction, which leads to the high activity and stability of the catalyst. The reconstructed surface is highly resistant to Cl– corrosion. The investigation suggests that a new strategy exists for the design of high-performance Ru-based electrocatalysts that resist anodic corrosion during seawater splitting.

Chemical Prelithiation/Presodiation Strategies Toward Controllable and Scalable Synthesis of Microsized Nanoporous Tin at Room Temperature for High‐Energy Sodium‐Ion Batteries

“…The D k connecting with dynamic can be calculated through EIS. The formula is shown below [ 27 ] : $$$$\begin{equation} {D}_{\mathrm{k}}=\ 0.5{\left(\frac{\mathrm{RT}}{A{n}^{2}{F}^{2}\mathrm{C}\sigma}\right)}^{2} \end{equation}$$$$σ corresponds to the slope of − Im(Z W ) versus ω −1/2 , and ω denotes angle frequency. As shown in Figure S25 (Supporting Information), the σ values of PreLi‐Sn and PreNa‐Sn are 25.5 and 11.4, indicating Na ions diffusion speed of PreNa‐Sn is faster than PreLi‐Sn.…”

Two-dimensional MXenes for flexible energy storage devices

“…4). 55,56 Gogotsi et al reported the Ti 3 C 2 T x MXene in 2011. 57 Subsequently, substantial MXenes have been reported by experiments and calculations.…”

“…Physical vacuum distillation. Feng et al designed a physical vacuum distillation to synthesize a series of MXenes 56.…”

Co doping promotes the alkaline overall seawater electrolysis performance over MnPSe3 nanosheets

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