Synthesis of porous thin silver films and their application for hydrogen peroxide sensing

Green Preparation of Ag-Au Bimetallic Nanoparticles Supported on Graphene with Alginate for Non-Enzymatic Hydrogen Peroxide Detection

“…The estimated sensitivity for H 2 O 2 sensor was 112.05 μA·cm −2 ·mM −1 . Additionally, according to the 3σ rule, the detection limit was calculated to be 0.57 μM estimated at a signal-to-noise ratio of 3 ( S / N = 3), which was the value of 3 σ/ S (σ is the standard deviation of the background signal, and S is the slope of H 2 O 2 concentration and reduction current shown in the Figure 7 B(b) [ 12 , 43 , 44 , 45 , 46 ]. The performances of modified electrodes were also compared with various sensors based on Ag and Au nanomaterials, and the results were presented in Table 1 .…”

“…Currently, many methods are used for the detection of H 2 O 2 , such as fluorometry [ 7 ], spectrophotometry [ 8 ], titrimetry [ 9 ], chemiluminescence [ 10 ], and electrochemical detection [ 11 ]. Among them, the electrochemical detection method has attracted wide attention due to its advantages of low cost, fast response, good stability, high sensitivity, and strong selectivity [ 12 ]. Additionally, electrochemical detection methods mainly include two categories: enzymatic detection and non-enzymatic detection [ 13 ].…”

Electrochemical Growth of Ag/Zn Alloys from Zinc Process Solutions and Their Dealloying Behavior

“…Additionally, Ag/Zn alloys can be used as the templates for the preparation of porous Ag-rich materials for various applications. − Traditionally, Ag and Zn have been combined using smelting–casting and electrodeposition. Among these, the smelting–casting process requires significant investment for high-temperature furnaces and milling facilities to mix high-purity Ag and Zn powders, − whereas electrodeposition involves the reduction of Ag and Zn ions from liquid solutions and can be performed at room temperature. − Nevertheless, because of the significant potential difference (1.56 V) between of Ag + /Ag ( E 0 (standard potential) = +0.15 V vs Hg/Hg 2 SO 4 ) and Zn 2+ /Zn ( E 0 = −1.41 V vs Hg/Hg 2 SO 4 ) redox pairs, traditional electrodeposition requires the addition of complexing agents like cyanides, ethylenediaminetetraacetic acid (EDTA), or thiourea to reduce the potential difference. − Consequently, the intensive use of such toxic chemicals increases both the economic costs and challenges of the solution purification. In comparison, the ability of EDRR to enable the combination of different metals with distinct potentials is exceptional as it can be performed at room temperature without the need for any additional chemicals such as complexing agents. − Earlier, EDRR studies have only investigated the formation of separate ultrafine particles (<1000 nm), while the further growth of the Ag/Zn bimetallic networks and dendrites has not been undertaken.…”

High-Performance, Flexible, All-Solid-State Wire-Shaped Asymmetric Micro-Supercapacitors Based on Three Dimensional CoNi2S4 Nanosheets Decorated–Nanoporous Ni–Zn–P Film/Cu Wire

“…In particular, the porous structure can maks fast transport of electrolyte ions into the inner structure of the electrodes and shorten the ion transport pathway. The template method is an effective approach for synthesizing porous structures, in which metal alloys are used as the template and subjected to dealloying to producing the porous films. − Recently, Wang et al prepared a mesoporous NiCo 2 O 4 film on Ni wire through the electrodeposition of nickel/cobalt/zinc ternary alloy layer, dealloying, and subsequently the oxidation process. The prepared electrode delivered a high specific capacity of 315.4 C g –1 at 1 A g –1 .…”