Fe₃N‐Co₂N Nanowires Array: A Non‐Noble‐Metal Bifunctional Catalyst Electrode for High‐Performance Glucose Oxidation and H₂O₂ Reduction toward Non‐Enzymatic Sensing Applications

Abstract

Among reported electrode materials, a nanoarray is an attractive architecture for molecular detection because of its large specific surface area and easy accessibility for target molecules. Here, a new Fe N-Co N nanowires array grown on carbon cloth (Fe N-Co N/CC) is reported as a non-noble-metal bifunctional catalyst electrode for high-performance glucose oxidation and H O reduction. As an electrochemical non-enzymatic sensor for glucose detection, Fe N-Co N/CC shows a fast response time of 8 s, a low detection limit (LOD) of 77 nm (signal/noise=3), and a high sensitivity of 4333.7 μA mm cm . As an H O sensor, it shows a LOD of 59 nm (signal/noise=3) and a sensitivity of 2273.8 μA mm cm with a response time of 2 s. In addition, the proposed sensor is stable with high selectivity, specificity, and reproducibility, and its application for real sample analysis has been successfully demonstrated.

Design and Application of Foams for Electrocatalysis

“…3) Fabricating carbon‐coated nanoarrays for superior conductivity and durability. Notably, such nanoarrays also hold great promise as catalyst electrodes for electrochemical oxidation of small molecules and sensing applications . Besides, such nanoarrays also offer us attractive precursors toward electrochemical topotactic fabrication of other nanoarray electrodes for applications …”

Phosphorus and Fluorine Co‐Doping Induced Enhancement of Oxygen Evolution Reaction in Bimetallic Nitride Nanorods Arrays: Ionic Liquid‐Driven and Mechanism Clarification

“…[11][12][13][14][15] In this regard, highlye fficient electrocatalysts with low overpotential are expected to accelerate the kinetics and promote the catalytice fficiency. [24][25][26][27][28] However,t heir practical large-scale applications are severelyr estrictedb yt he scarcity,high-cost, and low durability of these metals.Thus, designingh ighly active catalysts with lowo verpotential( h), small Ta fel slope, and superior chemical stability for OER becomes an extremelyu rgent topic to be pursued. [24][25][26][27][28] However,t heir practical large-scale applications are severelyr estrictedb yt he scarcity,high-cost, and low durability of these metals.Thus, designingh ighly active catalysts with lowo verpotential( h), small Ta fel slope, and superior chemical stability for OER becomes an extremelyu rgent topic to be pursued.…”

High‐Performance Non‐Enzyme Hydrogen Peroxide Detection in Neutral Solution: Using a Nickel Borate Nanoarray as a 3D Electrochemical Sensor

“…In sharp contrast, NiO/CC shows limited catalytic activity over Ni−Bi/CC (Figure S4). The cathodic current densities for Ni−Bi/CC increase with increased scan rates from 10 to 400 mV s −1 (Figure b) and are proportional to the scan rate (Figure S5), indicating an absorption‐controlled process of H 2 O 2 reduction on the Ni−Bi/CC electrode . Figure c shows the amperometric responses of Ni−Bi/CC in 0.1 m PBS in the absence and presence of 0, 1, 3, 5, and 7 m m H 2 O 2 .…”

“…The cathodic current densities for NiÀBi/CC increasew ith increased scan rates from 10 to 400 mV s À1 (Figure 3b)a nd are proportional to the scan rate ( Figure S5), indicating an absorption-controlled pro-cess of H 2 O 2 reduction on the NiÀBi/CC electrode. [24,27] Fig Figure S6a-S6c. Note that increased anodizationt ime and KÀBi concentration have al ittle influence on the H 2 O 2 sensinga bility for NiÀBi/CC.…”