Cobalt phthalocyanine prepared in situ on a sol–gel derived SiO2/SnO2 mixed oxide: Application in electrocatalytic oxidation of oxalic acid

Canevari, Thiago C.; Arguello, Jacqueline; Francisco, María; Gushikem, Yoshitaka

doi:10.1016/j.jelechem.2007.06.006

Cited by 45 publications

(20 citation statements)

References 42 publications

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“…In the earlier studies, most of the work was focused on the reduction of molecular O 2 but was later shown over the years that they catalyze a myriad of reactions. Some phthalocyanines and related macrocyclic complexes catalyze (i) the electrooxidation of formic acid [8,30], CO [8,[29][30][31][32][33], SO 2 [34][35][36], oxalic acid [37][38][39][40][41][42][43][44][45][46][47][48], glucose [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63], molecular hydrogen [64][65][66][67][68], H 2 O 2 [67][68][69], hydrazine [8,30,47,…”

Section: Introductionmentioning

confidence: 99%

Metallophthalocyanine-based molecular materials as catalysts for electrochemical reactions

Zagal¹,

Griveau²,

Silva³

et al. 2010

Coordination Chemistry Reviews

538

415

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Section: Introductionmentioning

confidence: 99%

Metallophthalocyanine-based molecular materials as catalysts for electrochemical reactions

Zagal¹,

Griveau²,

Silva³

et al. 2010

Coordination Chemistry Reviews

538

415

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“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] One of the greatest interests is its use as a porous substrate to immobilize electroactive species and the possibility to prepare a series of electrochemical sensors (chemically modified electrodes). [8][9][10][11][23][24][25][26] The metal oxides dispersed in the silica matrix are usually refractory, including TiO 2 , Al 2 O 3 , Sb 2 O 5 and Nb 2 O 5 . They present acid and basic properties and therefore can be used for adsorbing metal ions and anionic species depending upon the pH range.…”

Section: Introductionmentioning

confidence: 99%

Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions

Tarley

Ávila

Segatelli

et al. 2010

J. Braz. Chem. Soc.

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No presente trabalho foi avaliado um novo material como adsorvente, SiO 2 /Al 2 O 3 /Nb 2 O 5 (designado SiAlNb), empregado na determinação e pré-concentração online de Zn 2+ por um método espectrofotométrico por injeção em fluxo. O método de pré-concentração é baseado na adsorção de Zn 2+ em meio alcalino (pH 9,0) sobre a superfície de SiAlNb. A etapa de eluição é realizada usando solução de HNO 3 e é seguida da reação dos íons Zn , respectivamente. De acordo com o modelo linear de Langmuir, a capacidade máxima de adsorção foi de 7,0 mg de Zn 2+ por grama de SiAlNb. O método proposto foi aplicado com sucesso na determinação de Zn 2+ em amostras de água (lago, mineral e torneira) e material certificado de referência (TORT-2 Lobster Hepatopancreas).In the present work, a new material, SiO 2 /Al 2 O 3 /Nb 2 O 5 (designated as SiAlNb), was evaluated as an adsorbent in a flow injection spectrophotometric method for online preconcentration and determination of trace amounts of Zn 2+ ions. The preconcentration method is based on Zn 2+ adsorption onto the surface of SiAlNb in alkaline medium (pH 9.0). The elution step is carried out using HNO 3 solution, followed by reaction of the Zn 2+ ions with 1-(2-piridylazo)-2-naphtol (pan) in ammoniacal buffer solution (pH 9.3) containing of SiAlNb. The proposed method was successfully applied to the Zn 2+ determination in water samples (lake, mineral, tap) and certified reference material (TORT-2 Lobster Hepatopancreas).

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“…One is the enzymatic method that is the application of various enzymes for reaction with OA and electrochemical detection of the product [9,10]. Another is the direct electrooxidation of OA on different working electrodes such as platinum, gold, borondoped diamond electrode [11][12][13] or chemically modified electrodes such as carbon nanotube [14], SiO 2 /SnO 2 mixed oxide [15] -modified electrode. Ferro et al investigated the electrooxidation of OA on different electrode materials [16].…”

Section: Introductionmentioning

confidence: 99%

“…The electrochemical oxidation of OA at different electrode materials has been reported [11][12][13][14][15][16][17][18]. But to the best of our knowledge, there is no report on OA oxidation and determination using a GR-modified CILE, which exhibits attractive performances for the sensitive OA detection with excellent voltammetric response.…”

Section: Introductionmentioning

confidence: 99%

Sensitive electrochemical determination of oxalic acid in spinach samples by a graphene-modified carbon ionic liquid electrode

Cheng

You

Sha³

et al. 2014

Ionics

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In this paper, a new electrochemical oxalic acid (OA) sensor based on graphene (GR)-modified carbon ionic liquid electrode (CILE) was proposed. The GR nanosheets were deposited on the surface of CILE by electroreduction with graphene oxide as precursor and electrocatalytic oxidation of OA on GR/CILE was further investigated. As compared with that of bare CILE, the oxidation peak current of OA on GR/CILE were greatly improved with the decrease of the oxidation potential. Electrochemical parameters of the electrooxidation of OA were calculated. Under the selected conditions, the oxidation peak currents increased with OA concentration in the range from 8.0 μM to 6.0 mM with the detection limit as 0.48 μM (3σ). The proposed method exhibited higher sensitivity and wider linear range, which was applied to determination of OA concentration in spinach samples with satisfactory results.

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Cobalt phthalocyanine prepared in situ on a sol–gel derived SiO2/SnO2 mixed oxide: Application in electrocatalytic oxidation of oxalic acid

Cited by 45 publications

References 42 publications

Metallophthalocyanine-based molecular materials as catalysts for electrochemical reactions

Metallophthalocyanine-based molecular materials as catalysts for electrochemical reactions

Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions

Sensitive electrochemical determination of oxalic acid in spinach samples by a graphene-modified carbon ionic liquid electrode

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