Yang Cao

Bio: Yang Cao is an academic researcher from University of Electronic Science and Technology of China. The author has contributed to research in topics: Oxygen evolution & Nanosheet. The author has an hindex of 3, co-authored 4 publications receiving 72 citations. Previous affiliations of Yang Cao include Chongqing Normal University.

A NiCo LDH nanosheet array on graphite felt: an efficient 3D electrocatalyst for the oxygen evolution reaction in alkaline media

Abstract: The development of efficient electrocatalysts from Earth-abundant elements for the oxygen evolution reaction (OER) is highly desired. Here, we report the electrodeposition of a NiCo layered double hydroxide nanosheet array on graphite felt (NiCo LDHs/GF) as a 3D OER electrocatalyst. Such NiCo LDHs/GF exhibits superior electrocatalytic activity with the need for an overpotential of 249 mV to drive a current density of 20 mA cm−2 in 1.0 M KOH. It also shows strong long-term electrochemical durability with its activity being maintained for at least 24 h.

A Ni-MOF nanosheet array for efficient oxygen evolution electrocatalysis in alkaline media

Abstract: Highly stable and efficient non-noble-metal electrocatalysts are strongly desired for the oxygen evolution reaction (OER) in alkaline media. In this study, we report the use of 4,4′-biphenyl dicarboxylic acid as an organic ligand to in situ develop an Ni-MOF nanosheet array on nickel foam (Ni-MOF/NF) as an OER catalyst. In 1 M KOH, such 3D Ni-MOF/NF drives a current density of 20 mA cm−2 at a low overpotential of 350 mV. Moreover, it exhibits strong long-term electrochemical stability for at least 24 h and achieves a high turnover frequency of 0.24 mol O2 per s at an overpotential of 400 mV.

Core-shell composite N-doped-Co-MOF@polydopamine decorated with Ag nanoparticles for nonenzymatic glucose sensors

Abstract: A novel core–shell composite [email protected] ([email protected]) decorated with Ag nanoparticles was initially synthesized, and further utilized to design electrochemical sensors of nonenzymatic glucose. More importantly, it was found that dopamine (DA) could effectively and rapidly self-polymerize on the surface of N-Co-MOF, because N-Co-MOF might have the ability to catalyze DA self-polymerization. Afterwards, as-prepared [email protected] was performed as reducing agent, which could in situ transform Ag+ ions to Ag nanoparticles with uniform size, high dispersion and good conductivity. Finally, a non-enzymatic sensor was developed based on composite [email protected] with good performance for the electrocatalytic oxidation of glucose due to the synergetic effect between N-Co-MOF and Ag nanoparticles. [email protected] glucose sensor exhibits the wide linear range from 1 μM to 2 mM, with a limit of detection down to 0.5 μM (S/N = 3), as well as good selectivity, long-time stability and great reproducibility. Furthermore, the feasibility of practical applicability for glucose detection was witnessed in the actual samples of human serum with satisfactory consequence. These results suggest that [email protected] composite may be a promising candidate for the construction of non-enzymatic sensor.

NiFe Layered-Double-Hydroxide Nanosheet Arrays on Graphite Felt: A 3D Electrocatalyst for Highly Efficient Water Oxidation in Alkaline Media.

Abstract: It is of great importance to rationally design and develop earth-abundant nanocatalysts for high-efficiency water electrolysis. Herein, NiFe layered double hydroxide was in situ grown hydrothermally on a 3D graphite felt (NiFe LDH/GF) as a high-efficiency catalyst in facilitating the oxygen evolution reaction (OER). In 1.0 M KOH, NiFe LDH/GF requires a low overpotential of 214 mV to deliver a geometric current density of 50 mA cm-2 (η50 mA cm-2 = 214 mV), surpassing that NiFe LDH supported on a 2D graphite paper (NiFe LDH/GP; η50 mA cm-2 = 301 mV). More importantly, NiFe LDH/GF shows good durability at 50 mA cm-2 within 50 h of OER catalysis testing and delivers a faradaic efficiency of nearly 100% in the electrocatalysis of OER.