Islam Muhaiminul, Tran Duy Thanh, Nguyen Thanh Hai, Dinh Van An, Kim Nam Hoon, Lee Joong Hee
Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
J Colloid Interface Sci. 2022 Apr 15;612:121-131. doi: 10.1016/j.jcis.2021.12.137. Epub 2021 Dec 26.
Water splitting via the use of an efficient catalyst is a clean and cost-effective approach to produce green hydrogen. In this study, we successfully developed a novel hybrid coming from thin NiO-NiSe nanosheet-based heterostructure shelled high-conductive titanium nitride nanoarrays (TiN@NiO-NiSe) supported on carbon cloth (CC) via an optimized in-situ synthesis strategy. The hybrid possesses unique physicochemical properties due to the combination of merits from individual components and their synergistic effects, thereby boosting number and type of electroactive sites, reasonably adjusting Gibbs free adsorption energy, and promoting charge/mass transfers. As a potential bifunctional electrocatalyst, the hybrid requires low overpotentials of 115 and 240 mV to reach a current response of 10 mA cm towards hydrogen evolution reaction and oxygen evolution reaction in 1.0 M KOH, respectively. Therefore, an electrolyzer of the TiN@NiO-NiSe on CC exhibits a low operation voltage of 1.57 V at 10 mA cm together with a prospective durability, which exceed behaviors of Pt/C//RuO as well as recently reported bifunctional electrocatalysts. The results suggest a promising approach for developing cost-effective catalyst towards green hydrogen production via water splitting.
通过使用高效催化剂进行水分解是一种生产绿色氢气的清洁且具有成本效益的方法。在本研究中，我们通过优化的原位合成策略，成功开发了一种新型复合材料，该材料由基于NiO-NiSe纳米薄片的异质结构壳包裹的高导电氮化钛纳米阵列（TiN@NiO-NiSe）组成，并负载在碳布（CC）上。由于各个组分的优点及其协同效应的结合，该复合材料具有独特的物理化学性质，从而增加了电活性位点的数量和类型，合理调整了吉布斯自由吸附能，并促进了电荷/质量转移。作为一种潜在的双功能电催化剂，该复合材料在1.0 M KOH中分别需要115和240 mV的低过电位才能达到10 mA cm对析氢反应和析氧反应的电流响应。因此，CC上的TiN@NiO-NiSe电解槽在10 mA cm下表现出1.57 V的低工作电压以及预期的耐久性，超过了Pt/C//RuO以及最近报道的双功能电催化剂的性能。结果表明，这是一种通过水分解开发具有成本效益的绿色制氢催化剂的有前景的方法。
