Metal–organic frameworks (MOFs), which have attracted widespread interest, are used for electrode materials in renewable clean energy production and storage because of the large surface area, high porosity, and tailorability. Herein, we reported a three-dimensional (3D) flower-like Co–N-codoped carbon material derived from ZIF-67, which was deposited on cobalt-nanoparticle-embellished flexible carbon cloth (CoNC/Co@CC), directly acting as a high-activity bifunctional electrode for the oxygen evolution reaction (OER) and supercapacitors. The overpotential of CoNC/Co@CC is 360 mV with a modest Tafel slope of 76.9 mV dec^–1 and exhibits high stability for the OER in 1 M KOH electrolyte when the current density is 10 mA cm^–2. Meanwhile, the specific capacitance of CoNC/Co@CC reaches 192.0 F g^–1 at 0.25 A g^–1. CoNC/Co@CC exhibits a capacitance retention of 90.6% at 2 A g^–1 after 3000 cycles. The results suggest that CoNC/Co@CC shows promising applications in the OER and supercapacitors as a low-cost catalyst.

中文翻译：

---

ZIF-67衍生的Co-N-Copped碳/ Co @碳布混合体，用于析氧反应和超级电容器

金属有机骨架（MOF）引起了广泛的关注，由于其较大的表面积，高孔隙率和可定制性，可用于可再生清洁能源生产和存储中的电极材料。在此，我们报道了一种源自ZIF-67的三维（3D）花状Co-N掺杂碳材料，该材料沉积在缀有钴纳米颗粒的柔性碳布（CoNC / Co @ CC）上，直接用作用于氧气析出反应（OER）和超级电容器的高活性双功能电极。CoNC / Co @ CC的过电势为360 mV，Tafel斜度为76.9 mV dec ^–1，当电流密度为10 mA cm ^–2时，在1 M KOH电解质中对OER表现出高稳定性。同时，CONC /钴@ CC达到192.0 F G比电容^-1在0.25 A克^-1。在3000次循环后，CoNC / Co @ CC在2 A g ^–1下显示出90.6％的电容保持率。结果表明，CoNC / Co @ CC在低成本的OER和超级电容器中显示出广阔的应用前景。