Elektrodenkinetische untersuchungen zur NO+-bildung aus HNO2 an blanken platinkathoden im perchlorsauren medium mit hilfe der potentiostatischen einschaltmethode

Nitrogen Cycle Electrocatalysis

“…The electrocatalytic reduction of nitrite in highly concentrated acidic media has been reported in a number of papers. [247][248][249][250] Under these conditions, it is necessary to consider the additional acid-base equilibrium, reaction 46. Heckner and Schmid 248 investigated the reaction at a Pt electrode in concentrated perchloric acid (2-9 M), and established the key role of the nitrosonium ion (NO + ) as the actual electroactive species.…”

“…The electrocatalytic reduction of nitrite in highly concentrated acidic media has been reported in a number of papers. − Under these conditions, it is necessary to consider the additional acid−base equilibrium, reaction . Heckner and Schmid investigated the reaction at a Pt electrode in concentrated perchloric acid (2−9 M), and established the key role of the nitrosonium ion (NO + ) as the actual electroactive species.…”

Electrochemical reduction of nitrate on Pt(S)[n(1 1 1) × (1 1 1)] electrodes in perchloric acid solution

“…The electrochemical reduction of nitrate ion has been investigated over the last five decades [1][2][3][4][5][6][7][8][9]. Recently, the electrochemical reduction of nitrate has gained renewed interest in view of its relevance not only to the production of some valuable compounds, such as nitrous oxide for medical applications, hydroxylamine for the manufacture of caprolactam, and ammonia for fertilizers [10] but also to the removal of nitrate contamination in groundwater [10,11] and radio-active waste from nuclear industry [10,[12][13][14].…”

“…Recently, the electrochemical reduction of nitrate has gained renewed interest in view of its relevance not only to the production of some valuable compounds, such as nitrous oxide for medical applications, hydroxylamine for the manufacture of caprolactam, and ammonia for fertilizers [10] but also to the removal of nitrate contamination in groundwater [10,11] and radio-active waste from nuclear industry [10,[12][13][14]. The reduction process has been studied on pure metal [1][2][3][4][5][6][7][8][9][12][13][14][15][16][17][18][19][20][21][22][23][24], alloy [19,25,26], and adatom-modified electrodes [27][28][29][30][31][32][33][34][35], involving mostly polycrystalline and platinized platinum electrodes in acidic solutions [1][2][3][4][5]…”

Redução de íons nitrato em eletrodos de paládio suportados em carbono

“…Pode-se investigar diferentes eletrocatalisadores com variedades no tamanho de partícula, e fazer um exame das vantagens das propriedades catalíticas incomuns das nanopartículas, um fenômeno documentado bem em estudos em ultra-alto vácuo 3 e explorado mais recentemente na relação de sólido/liquido . Espera-se que para alguma escala do tamanho de partícula o paládio retenha sua seletividade raramente elevada para a formação do A cinética da redução de íons nitrato em eletrodos de platina monocristalina foi objeto de vários estudos 6,7,8,9,10 . Schmid e colaboradores 6,7,8,9 foram os primeiros a propor um mecanismo para a redução do ácido nítrico na presença de ácido nitroso sobre platina.…”