Abstract: The present invention relates to the electrolytic splitting of water using a carbon-supported manganese oxide (MnOx) composite. Specifically, the present electrolytic splitting of water is carried under neutral electrolyte conditions with a high electrolytic activity, while using an oxygen evolution reaction (OER)-electrode comprising the present carbon-supported MnOx composite. Next, the present invention relates to a process for producing such a carbon-supported MnOx composite as well as to a composite obtainable by the present process for producing the same and to an OER-electrode comprising the carbon-supported MnOx composite obtainable by the present process.

Abstract: The present invention relates to the electrolytic splitting of water using a carbon-supported manganese oxide (MnOx) composite. Specifically, the present electrolytic splitting of water is carried under neutral electrolyte conditions with a high electrolytic activity, while using an oxygen evolution reaction (OER)-electrode comprising the present carbon-supported MnOx composite. Next, the present invention relates to a process for producing such a carbon-supported MnOx composite as well as to a composite obtainable by the present process for producing the same and to an OER-electrode comprising the carbon-supported MnOx composite obtainable by the present process.

Abstract: The invention relates to a method for measuring a relative velocity between an object surface (O) and a sensor (1) having at least one light-sensitive element (2) according to the spatial frequency filtering method, wherein the light-sensitive element (2) is read out at time intervals, and wherein the spatial frequency filter is designed as at least one masking grating having a variable grating constant. The method according to the invention is characterized in that the relative velocity is firstly measured with a first grating constant k1 having a large period length and/or over a short observation time period t1 (rough measurement) and then the measurement of the relative velocity is repeated for an exact determination using a second grating constant k2 having a small period length and/or over a long observation time period t2 (fine measurement). The invention further relates to a sensor for velocity measurement.

Abstract: A method for measuring a velocity of an object surface relative to a sensor having a plurality of light-sensitive elements arranged spaced apart from one another. Each light-sensitive element produces an element signal indicative of detected brightness. The method includes receiving element signals at intervals of time, producing a frequency signal according to a spatial frequency filter method, producing a correlation signal according to an image processing method, and monitoring the produced frequency signal regarding at least one of a frequency value and at least one quality feature of the frequency signal. The method also includes selecting a produced signal for determining the velocity of the object surface relative to the sensor, and selecting the correlation signal in the event that at least one of the frequency signal lies below a threshold frequency value and the frequency signal fails to achieve a threshold quality feature value.

Abstract: The invention relates to a method for measuring a relative velocity between an object surface (O) and a sensor (1) having at least one light-sensitive element (2) according to the spatial frequency filtering method, wherein the light-sensitive element (2) is read out at time intervals, and wherein the spatial frequency filter is designed as at least one masking grating having a variable grating constant. The method according to the invention is characterized in that the relative velocity is firstly measured with a first grating constant k1 having a large period length and/or over a short observation time period t1 (rough measurement) and then the measurement of the relative velocity is repeated for an exact determination using a second grating constant k2 having a small period length and/or over a long observation time period t2 (fine measurement). The invention further relates to a sensor for velocity measurement.